feat: add PlayOnTrigger for music-synced audio playback

- Add PlayOnTrigger method to AudioSystem for scheduling audio playback on music sync events (beat/bar/grid)
- Rename ButtonInvoker to SetStateBind for better clarity
- Update PlaySoundBind to support both direct playback and trigger-based playback with callback flags
- Add CallbackFlags enum (MusicSyncBeat, MusicSyncBar, MusicSyncGrid)
- Update Metronome demo to use new callback flag naming convention
- Add test audio file sfx_notice_test.wav
- Update scene UI to demonstrate PlayOnTrigger functionality

Assets/Scripts/OCES/Audio/HandWritten/HandWrittenDefinitions.cs

@@ -86,9 +86,10 @@ namespace OCES.Audio
     public partial class MusicPath    : IPathEntry { }
     public partial class AmbiencePath : IPathEntry { }
     
-    public class SwitchEntry
+    public enum CallbackFlags
     {
-        public uint SwitchValue;
-        public uint AudioObjectId;
+        MusicSyncBeat = 1,
+        MusicSyncBar = 2,
+        MusicSyncGrid = 3,
     }
 }