Add ability to toggle One Shot functionality (#4198)

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

quantum/keycode_config.h

@@ -37,6 +37,7 @@ typedef union {
         bool nkro : 1;
         bool swap_lctl_lgui : 1;
         bool swap_rctl_rgui : 1;
+        bool oneshot_disable : 1;
     };
 } keymap_config_t;
 

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
         }
     }

quantum/quantum_keycodes.h

@@ -578,6 +578,10 @@ enum quantum_keycodes {
 
 #endif
 
+    ONESHOT_ENABLE,
+    ONESHOT_DISABLE,
+    ONESHOT_TOGGLE,
+
     // always leave at the end
     SAFE_RANGE
 };
@@ -885,3 +889,8 @@ enum quantum_keycodes {
 #define DM_RSTP DYN_REC_STOP
 #define DM_PLY1 DYN_MACRO_PLAY1
 #define DM_PLY2 DYN_MACRO_PLAY2
+
+// One Shot toggle
+#define OS_TOGG ONESHOT_TOGGLE
+#define OS_ON   ONESHOT_ENABLE
+#define OS_OFF  ONESHOT_DISABLE