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/Layers/EditorLayer.cpp

@@ -8,6 +8,7 @@
 #include "panels/ProjectPanel.h"
 #include "Core/IEditorContext.h"
 #include "Core/EditorContext.h"
+#include "Core/IUndoManager.h"
 #include <filesystem>
 #include <imgui.h>
 #include <imgui_internal.h>
@@ -45,6 +46,7 @@ void EditorLayer::onAttach() {
     m_projectPanel->Initialize(m_context->GetProjectPath());
     m_context->GetSceneManager().LoadStartupScene(m_context->GetProjectPath());
     m_context->GetProjectManager().RefreshCurrentFolder();
+    m_context->GetUndoManager().ClearHistory();
 
     m_menuBar->OnAttach();
     m_hierarchyPanel->OnAttach();