docs(coroutine): 更新协程扩展方法和定时器类的文档注释

- 为 CoroutineExtensions 类添加了总体功能描述
- 完善了 RunCoroutine 方法的参数和返回值文档注释
- 补充了 CancelWith 方法族的参数说明和返回值描述
- 优化了 AllNodesAlive 私有方法的文档注释格式
- 将 Timing 类中的重复错误消息提取为静态只读字段
- 统一了调度器属性的异常消息为常量引用
- [release ci]

GFramework.Godot/coroutine/CoroutineExtensions.cs

@@ -4,11 +4,18 @@ using Godot;
 
 namespace GFramework.Godot.coroutine;
 
+/// <summary>
+///     提供协程相关的扩展方法，用于简化协程的启动和管理。
+/// </summary>
 public static class CoroutineExtensions
 {
     /// <summary>
-    ///     启动协程的扩展方法
+    ///     启动协程的扩展方法。
     /// </summary>
+    /// <param name="coroutine">要启动的协程枚举器。</param>
+    /// <param name="segment">协程运行的时间段，默认为 Process。</param>
+    /// <param name="tag">协程的标签，可用于标识或分组协程。</param>
+    /// <returns>返回协程的句柄，可用于后续操作（如停止协程）。</returns>
     public static CoroutineHandle RunCoroutine(
         this IEnumerator<IYieldInstruction> coroutine,
         Segment segment = Segment.Process,
@@ -18,8 +25,11 @@ public static class CoroutineExtensions
     }
 
     /// <summary>
-    ///     让协程在指定节点被销毁时自动取消
+    ///     让协程在指定节点被销毁时自动取消。
     /// </summary>
+    /// <param name="coroutine">要执行的协程枚举器。</param>
+    /// <param name="node">用于检查是否存活的节点。</param>
+    /// <returns>包装后的协程枚举器。</returns>
     public static IEnumerator<IYieldInstruction> CancelWith(
         this IEnumerator<IYieldInstruction> coroutine,
         Node node)
@@ -29,8 +39,12 @@ public static class CoroutineExtensions
     }
 
     /// <summary>
-    ///     让协程在任一节点被销毁时自动取消
+    ///     让协程在任一节点被销毁时自动取消。
     /// </summary>
+    /// <param name="coroutine">要执行的协程枚举器。</param>
+    /// <param name="node1">第一个用于检查是否存活的节点。</param>
+    /// <param name="node2">第二个用于检查是否存活的节点。</param>
+    /// <returns>包装后的协程枚举器。</returns>
     public static IEnumerator<IYieldInstruction> CancelWith(
         this IEnumerator<IYieldInstruction> coroutine,
         Node node1,
@@ -43,11 +57,11 @@ public static class CoroutineExtensions
     }
 
     /// <summary>
-    ///     让协程在多个节点都被销毁时自动取消
+    ///     让协程在多个节点都被销毁时自动取消。
     /// </summary>
-    /// <param name="coroutine">要执行的协程枚举器</param>
-    /// <param name="nodes">用于检查是否存活的节点数组</param>
-    /// <returns>包装后的协程枚举器</returns>
+    /// <param name="coroutine">要执行的协程枚举器。</param>
+    /// <param name="nodes">用于检查是否存活的节点数组。</param>
+    /// <returns>包装后的协程枚举器。</returns>
     public static IEnumerator<IYieldInstruction> CancelWith(
         this IEnumerator<IYieldInstruction> coroutine,
         params Node[] nodes)
@@ -58,10 +72,10 @@ public static class CoroutineExtensions
     }
 
     /// <summary>
-    ///     检查所有节点是否都处于存活状态
+    ///     检查所有节点是否都处于存活状态。
     /// </summary>
-    /// <param name="nodes">要检查的节点数组</param>
-    /// <returns>如果所有节点都存活则返回true，否则返回false</returns>
+    /// <param name="nodes">要检查的节点数组。</param>
+    /// <returns>如果所有节点都存活则返回 true，否则返回 false。</returns>
     private static bool AllNodesAlive(Node[] nodes)
     {
         return nodes.All(Timing.IsNodeAlive);

GFramework.Godot/coroutine/Timing.cs

@@ -28,34 +28,35 @@ public partial class Timing : Node
     private GodotTimeSource? _processTimeSource;
     private CoroutineScheduler? _processIgnorePauseScheduler;
     private GodotTimeSource? _processIgnorePauseTimeSource;
+    private const string NotInitializedMessage = "Timing not yet initialized (_Ready not executed)";
 
     /// <summary>
     ///     获取Process调度器，如果未初始化则抛出异常
     /// </summary>
     private CoroutineScheduler ProcessScheduler =>
         _processScheduler ?? throw new InvalidOperationException(
-            "Timing not yet initialized (_Ready not executed)");
+            NotInitializedMessage);
 
     /// <summary>
     ///     获取忽略暂停的Process调度器，如果未初始化则抛出异常
     /// </summary>
     private CoroutineScheduler ProcessIgnorePauseScheduler =>
         _processIgnorePauseScheduler ?? throw new InvalidOperationException(
-            "Timing not yet initialized (_Ready not executed)");
+            NotInitializedMessage);
 
     /// <summary>
     ///     获取Physics调度器，如果未初始化则抛出异常
     /// </summary>
     private CoroutineScheduler PhysicsScheduler =>
         _physicsScheduler ?? throw new InvalidOperationException(
-            "Timing not yet initialized (_Ready not executed)");
+            NotInitializedMessage);
 
     /// <summary>
     ///     获取Deferred调度器，如果未初始化则抛出异常
     /// </summary>
     private CoroutineScheduler DeferredScheduler =>
         _deferredScheduler ?? throw new InvalidOperationException(
-            "Timing not yet initialized (_Ready not executed)");
+            NotInitializedMessage);
 
     #region 单例