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/PlaySoundBind.cs

@@ -2,16 +2,23 @@ using System.Collections;
 using System.Collections.Generic;
 using OCES.Audio;
 using UnityEngine;
+using UnityEngine.Serialization;
 using UnityEngine.UI;
 
 public class PlaySoundBind : MonoBehaviour
 {
-    
+    public CallbackFlags callbackFlags;
     public InputField inputField;
     
-    public void OnButtonPressed()
+    public void PlaySound()
     {
-        uint.TryParse(this.inputField.text, out uint hapticId);
-        AudioSystem.Instance.Play(hapticId);
+        uint.TryParse(this.inputField.text, out uint audioId);
+        AudioSystem.Instance.Play(audioId);
+    }
+
+    public void PlaySoundOnTrigger()
+    {
+        uint.TryParse(this.inputField.text, out uint audioId);
+        AudioSystem.Instance.PlayOnTrigger(audioId, this.callbackFlags);
     }
 }