Add ability to toggle One Shot functionality (#4198)

Co-authored-by: Nick Brassel <nick@tzarc.org>
Co-authored-by: Ryan <fauxpark@gmail.com>

quantum/quantum.c

@@ -318,6 +318,17 @@ bool process_record_quantum(keyrecord_t *record) {
             case OUT_BT:
                 set_output(OUTPUT_BLUETOOTH);
                 return false;
+#endif
+#ifndef NO_ACTION_ONESHOT
+            case ONESHOT_TOGGLE:
+                oneshot_toggle();
+                break;
+            case ONESHOT_ENABLE:
+                oneshot_enable();
+                break;
+            case ONESHOT_DISABLE:
+                oneshot_disable();
+                break;
 #endif
         }
     }