✨ SOUND_ON_DEFAULT option (#24102)

Co-authored-by: Scott Lahteine <github@thinkyhead.com>

Marlin/src/lcd/extui/mks_ui/mks_hardware.cpp

@@ -160,6 +160,8 @@
     #endif
   }
 
+  #include "../../../libs/buzzer.h"
+
   void init_test_gpio() {
     endstops.init();
 
@@ -201,12 +203,7 @@
     #endif
   }
 
-  void mks_test_beeper() {
-    WRITE(BEEPER_PIN, HIGH);
-    delay(100);
-    WRITE(BEEPER_PIN, LOW);
-    delay(100);
-  }
+  void mks_test_beeper() { buzzer.click(100); }
 
   #if ENABLED(SDSUPPORT)