✨ Laser Safety Timeout (#24189)

Marlin/Configuration_adv.h

@@ -3544,6 +3544,16 @@
     #define LASER_TEST_PULSE_MIN           1   // Used with Laser Control Menu
     #define LASER_TEST_PULSE_MAX         999   // Caution: Menu may not show more than 3 characters
 
+   /**
+    * Laser Safety Timeout
+    *
+    * The laser should be turned off when there is no movement for a period of time.
+    * Consider material flammability, cut rate, and G-code order when setting this
+    * value. Too low and it could turn off during a very slow move; too high and
+    * the material could ignite.
+    */
+    #define LASER_SAFETY_TIMEOUT_MS     1000   // (ms)
+
     /**
      * Enable inline laser power to be handled in the planner / stepper routines.
      * Inline power is specified by the I (inline) flag in an M3 command (e.g., M3 S20 I)