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/AudioSystem.cs

@@ -127,6 +127,49 @@ namespace OCES.Audio
             ActiveStates = this.m_musicSystem.ActiveStates;
         }
 
+        public void PlayOnTrigger(uint audioId, CallbackFlags callbackFlags)
+        {
+            Action<uint> callback = null;
+            callback = (id) =>
+            {
+                // 播放音效
+                Play(audioId);
+        
+                // 取消订阅，确保只触发一次
+                switch (callbackFlags)
+                {
+                    case CallbackFlags.MusicSyncBeat:
+                        OnBeat -= callback;
+                        break;
+                    case CallbackFlags.MusicSyncBar:
+                        OnBar -= callback;
+                        break;
+                    case CallbackFlags.MusicSyncGrid:
+                        OnGrid -= callback;
+                        break;
+                }
+            };
+    
+            // 订阅对应的事件
+            switch (callbackFlags)
+            {
+                case CallbackFlags.MusicSyncBeat:
+                    OnBeat += callback;
+                    break;
+                case CallbackFlags.MusicSyncBar:
+                    OnBar += callback;
+                    break;
+                case CallbackFlags.MusicSyncGrid:
+                    OnGrid += callback;
+                    break;
+                
+                default:
+                    Debug.LogWarning($"[AudioSystem] Unknown callback flag '{callbackFlags}'." +
+                                     $"Audio Container with ID {audioId} will be ignored.");
+                    break;
+            }
+        }
+
         // ─────────────────────────────────────────────
         // 初始化
         // ─────────────────────────────────────────────