docs: 更新 containers 和 threading 模块文档

- containers: 更新 string 类的多个方法文档
- threading: 更新 mutex 和 task-group 方法文档

editor/src/Core/IEditorContext.h

@@ -10,6 +10,7 @@ class EventBus;
 class ISelectionManager;
 class IProjectManager;
 class ISceneManager;
+class IUndoManager;
 
 class IEditorContext {
 public:
@@ -19,6 +20,7 @@ public:
     virtual ISelectionManager& GetSelectionManager() = 0;
     virtual ISceneManager& GetSceneManager() = 0;
     virtual IProjectManager& GetProjectManager() = 0;
+    virtual IUndoManager& GetUndoManager() = 0;
     
     virtual void SetProjectPath(const std::string& path) = 0;
     virtual const std::string& GetProjectPath() const = 0;