Recommend Z Safe Homing

Co-Authored-By: Vertabreaker <opyrus@hotmail.com>

Marlin/src/inc/SanityCheck.h

     #error "Z_PROBE_LOW_POINT must be less than or equal to 0."
   #endif
 
+  #if HOMING_Z_WITH_PROBE && DISABLED(Z_SAFE_HOMING)
+    #error "Z_SAFE_HOMING is recommended when homing with a probe. Enable it or comment out this line to continue."
+  #endif
+
 #else
 
   /**