refactor(coroutine): 重构协程调度器以支持WaitForCoroutine指令

- 将WaitForCoroutine改为构造函数注入协程枚举器的方式
- 添加ProcessWaitingInstruction方法专门处理等待指令
- 添加IsWaiting方法判断协程等待状态
- 添加ProcessCoroutineStep方法处理协程步骤推进
- 添加HandleYieldInstruction方法处理yield指令逻辑
- 实现WaitForCoroutine指令的完整协程等待功能
- 在协程完成时通知WaitForCoroutine指令标记完成状态
- 优化协程调度器的执行流程和异常处理机制

GFramework.Core/coroutine/CoroutineScheduler.cs

@@ -1,4 +1,5 @@
 using GFramework.Core.Abstractions.coroutine;
+using GFramework.Core.coroutine.instructions;
 
 namespace GFramework.Core.coroutine;
 
@@ -98,21 +99,12 @@ public sealed class CoroutineScheduler(
 
             try
             {
-                // 1️⃣ 处理等待指令
-                if (slot.Waiting != null)
+                ProcessWaitingInstruction(slot, delta);
+
+                if (!IsWaiting(slot))
                 {
-                    slot.Waiting.Update(delta);
-                    if (!slot.Waiting.IsDone)
-                        continue;
-
-                    slot.Waiting = null;
+                    ProcessCoroutineStep(slot, i);
                 }
-
-                // 2️⃣ 推进协程
-                if (!slot.Enumerator.MoveNext())
-                    Complete(i);
-                else
-                    slot.Waiting = slot.Enumerator.Current;
             }
             catch (Exception ex)
             {
@@ -121,6 +113,68 @@ public sealed class CoroutineScheduler(
         }
     }
 
+    /// <summary>
+    ///     处理协程的等待指令
+    /// </summary>
+    /// <param name="slot">协程槽位</param>
+    /// <param name="delta">时间差值</param>
+    private static void ProcessWaitingInstruction(CoroutineSlot slot, double delta)
+    {
+        if (slot.Waiting == null)
+            return;
+
+        slot.Waiting.Update(delta);
+        if (slot.Waiting.IsDone)
+            slot.Waiting = null;
+    }
+
+    /// <summary>
+    ///     判断协程是否正在等待
+    /// </summary>
+    /// <param name="slot">协程槽位</param>
+    /// <returns>是否正在等待</returns>
+    private static bool IsWaiting(CoroutineSlot slot)
+    {
+        return slot.Waiting != null && !slot.Waiting.IsDone;
+    }
+
+    /// <summary>
+    ///     处理协程步骤推进
+    /// </summary>
+    /// <param name="slot">协程槽位</param>
+    /// <param name="slotIndex">槽位索引</param>
+    private void ProcessCoroutineStep(CoroutineSlot slot, int slotIndex)
+    {
+        if (!slot.Enumerator.MoveNext())
+        {
+            Complete(slotIndex);
+            return;
+        }
+
+        var current = slot.Enumerator.Current;
+        HandleYieldInstruction(slot, current);
+    }
+
+    /// <summary>
+    ///     处理协程的yield指令
+    /// </summary>
+    /// <param name="slot">协程槽位</param>
+    /// <param name="instruction">yield指令</param>
+    private void HandleYieldInstruction(CoroutineSlot slot, IYieldInstruction instruction)
+    {
+        // 处理 WaitForCoroutine 指令
+        if (instruction is WaitForCoroutine waitForCoroutine)
+        {
+            // 启动被等待的协程并建立等待关系
+            var targetHandle = Run(waitForCoroutine.Coroutine);
+            WaitForCoroutine(slot.Handle, targetHandle);
+        }
+        else
+        {
+            slot.Waiting = instruction;
+        }
+    }
+
     #endregion
 
     #region Pause / Resume / Kill
@@ -300,6 +354,12 @@ public sealed class CoroutineScheduler(
             if (!_metadata.TryGetValue(waiter, out var meta)) continue;
             var s = _slots[meta.SlotIndex];
             if (s == null) continue;
+            // 通知 WaitForCoroutine 指令协程已完成
+            if (s.Waiting is WaitForCoroutine wfc)
+            {
+                wfc.Complete();
+            }
+
             s.State = CoroutineState.Running;
             meta.State = CoroutineState.Running;
         }

GFramework.Core/coroutine/instructions/WaitForCoroutine.cs

@@ -5,10 +5,21 @@ namespace GFramework.Core.coroutine.instructions;
 /// <summary>
 ///     等待协程完成的指令类，实现IYieldInstruction接口
 /// </summary>
-public sealed class WaitForCoroutine : IYieldInstruction
+/// <param name="coroutine">需要等待完成的协程枚举器</param>
+public sealed class WaitForCoroutine(IEnumerator<IYieldInstruction> coroutine) : IYieldInstruction
 {
     /// <summary>
-    ///     更新方法，用于处理时间更新逻辑
+    /// 获取内部协程枚举器
+    /// </summary>
+    internal IEnumerator<IYieldInstruction> Coroutine => coroutine;
+
+    /// <summary>
+    /// 获取当前等待的协程是否已完成
+    /// </summary>
+    public bool IsDone { get; private set; }
+
+    /// <summary>
+    /// 更新方法，用于处理协程等待逻辑
     /// </summary>
     /// <param name="delta">时间增量</param>
     public void Update(double delta)
@@ -16,12 +27,7 @@ public sealed class WaitForCoroutine : IYieldInstruction
     }
 
     /// <summary>
-    ///     获取协程是否已完成的状态
-    /// </summary>
-    public bool IsDone { get; private set; }
-
-    /// <summary>
-    ///     内部方法，用于标记协程完成状态
+    /// 标记协程等待完成
     /// </summary>
     internal void Complete()
     {