PLR accessors for Ext UI (#23687)

Marlin/src/lcd/extui/ui_api.cpp

   #include "../../feature/caselight.h"
 #endif
 
+#if ENABLED(POWER_LOSS_RECOVERY)
+  #include "../../feature/powerloss.h"
+#endif
+
 #if ENABLED(BABYSTEPPING)
   #include "../../feature/babystep.h"
 #endif
     #endif
   #endif
 
+  #if ENABLED(POWER_LOSS_RECOVERY)
+    bool getPowerLossRecoveryEnabled()                 { return recovery.enabled; }
+    void setPowerLossRecoveryEnabled(const bool value) {  recovery.enable(value); }
+  #endif
+
   #if ENABLED(LIN_ADVANCE)
     float getLinearAdvance_mm_mm_s(const extruder_t extruder) {
       return (extruder < EXTRUDERS) ? planner.extruder_advance_K[extruder - E0] : 0;

Marlin/src/lcd/extui/ui_api.h

     #endif
   #endif
 
+  #if ENABLED(POWER_LOSS_RECOVERY)
+    bool getPowerLossRecoveryEnabled();
+    void setPowerLossRecoveryEnabled(const bool);
+  #endif
+
   #if ENABLED(PIDTEMP)
     float getPIDValues_Kp(const extruder_t);
     float getPIDValues_Ki(const extruder_t);