Reapply "Merge pull request '리듬게임' (#5) from CatsRhythmGame into main"

This reverts commit d7d5519fbf.

Assets/02_Scripts/Core/Util.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Threading;
+using UnityEngine;
+
+public static class Util
+{
+ /// 특정 시간(초) 후에 액션을 실행
+    public static async Awaitable RunDelayed(float delay, Action action, CancellationToken token = default)
+    {
+        try
+        {
+            // 유니티 전용 비동기 대기
+            await Awaitable.WaitForSecondsAsync(delay, token);
+
+            // 함수 실행
+            action?.Invoke();
+        }
+        catch (OperationCanceledException)
+        {
+            // 취소되었을 때의 처리 (필요 시)
+        }
+    }
+
+    /// 다음 프레임에 액션을 실행
+    public static async Awaitable RunNextFrame(Action action, CancellationToken token = default)
+    {
+        try
+        {
+            await Awaitable.EndOfFrameAsync(token);
+            action?.Invoke();
+        }
+        catch (OperationCanceledException) { }
+    }
+
+    public static float NormalizeAngle(float angle)
+    {
+        while (angle > 180)
+            angle -= 360;
+        while (angle < -180)
+            angle += 360;
+        return angle;
+    }
+}