Add option to disallow filament change without homing first

Marlin/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/Marlin_main.cpp

    */
   inline void gcode_M600() {
 
-    // Don't allow filament change without homing first
-    if (axis_unhomed_error()) {
-        home_all_axes();
-    }
+    #if ENABLED(HOME_BEFORE_FILAMENT_CHANGE)
+      // Don't allow filament change without homing first
+      if (axis_unhomed_error()) home_all_axes();
+    #endif
 
     // Initial retract before move to filament change position
     const float retract = parser.seen('E') ? parser.value_axis_units(E_AXIS) : 0

Marlin/SanityCheck.h

     #error "EXTRUDER_RUNOUT_PREVENT is incompatible with ADVANCED_PAUSE_FEATURE."
   #elif ENABLED(PARK_HEAD_ON_PAUSE) && DISABLED(SDSUPPORT) && DISABLED(NEWPANEL) && DISABLED(EMERGENCY_PARSER)
     #error "PARK_HEAD_ON_PAUSE requires SDSUPPORT, EMERGENCY_PARSER, or an LCD controller."
+  #elif ENABLED(HOME_BEFORE_FILAMENT_CHANGE) && DISABLED(PAUSE_PARK_NO_STEPPER_TIMEOUT)
+    #error "HOME_BEFORE_FILAMENT_CHANGE requires PAUSE_PARK_NO_STEPPER_TIMEOUT"
   #endif
 #endif
 

Marlin/example_configurations/Cartesio/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/Felix/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/FolgerTech-i3-2020/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   #define PARK_HEAD_ON_PAUSE                  // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/Hephestos/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/Hephestos_2/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/K8200/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/K8400/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/M150/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/RigidBot/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/SCARA/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/TAZ4/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/TinyBoy2/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/WITBOX/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/delta/FLSUN/auto_calibrate/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/delta/FLSUN/kossel_mini/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/delta/generic/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/gCreate_gMax1.5+/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   #define PARK_HEAD_ON_PAUSE                  // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/makibox/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc

Marlin/example_configurations/wt150/Configuration_adv.h

   #define PAUSE_PARK_NO_STEPPER_TIMEOUT       // Enable to have stepper motors hold position during filament change
                                               // even if it takes longer than DEFAULT_STEPPER_DEACTIVE_TIME.
   //#define PARK_HEAD_ON_PAUSE                // Go to filament change position on pause, return to print position on resume
+  //#define HOME_BEFORE_FILAMENT_CHANGE       // Ensure homing has been completed prior to parking for filament change
 #endif
 
 // @section tmc