Move some MarlinCore and MarlinUI code (#20832)

Marlin/src/gcode/control/M108_M112_M410.cpp

@@ -25,7 +25,8 @@
 #if DISABLED(EMERGENCY_PARSER)
 
 #include "../gcode.h"
-#include "../../MarlinCore.h" // for wait_for_heatup, kill, quickstop_stepper
+#include "../../MarlinCore.h" // for wait_for_heatup, kill
+#include "../../module/motion.h" // for quickstop_stepper
 
 /**
  * M108: Stop the waiting for heaters in M109, M190, M303. Does not affect the target temperature.

Marlin/src/gcode/control/M226.cpp

@@ -28,6 +28,8 @@
 #include "../../MarlinCore.h" // for pin_is_protected and idle()
 #include "../../module/stepper.h"
 
+void protected_pin_err();
+
 /**
  * M226: Wait until the specified pin reaches the state required (M226 P<pin> S<state>)
  */

Marlin/src/gcode/control/M42.cpp

@@ -31,6 +31,10 @@
   #include "../../module/temperature.h"
 #endif
 
+void protected_pin_err() {
+  SERIAL_ERROR_MSG(STR_ERR_PROTECTED_PIN);
+}
+
 /**
  * M42: Change pin status via GCode
  *