Implement XAP 'secure' core requirements (#16843)

Co-authored-by: Drashna Jaelre <[email protected]>
Co-authored-by: Stefan Kerkmann <[email protected]>

quantum/quantum_keycodes.h

@@ -597,6 +597,10 @@ enum quantum_keycodes {
 
     QK_MAKE,
 
+    SECURE_LOCK,
+    SECURE_UNLOCK,
+    SECURE_TOGGLE,
+
     // Start of custom keycode range for keyboards and keymaps - always leave at the end
     SAFE_RANGE
 };