docs: Add Component, GameObject, TransformComponent and Scene API documentation

- Add Component class documentation with lifecycle methods
- Add GameObject class documentation with component system
- Add TransformComponent documentation with transform methods
- Add Scene class documentation with GameObject management
- Add SceneManager singleton documentation with scene loading
- Update components.md overview with all component classes
- Update main.md navigation with Scene module

docs/api/components/game-object/get-component-in-parent.md

@@ -0,0 +1,20 @@
+# GameObject::GetComponentInParent
+
+在父对象链中查找指定类型的组件。
+
+```cpp
+template<typename T>
+T* GetComponentInParent();
+```
+
+递归向上搜索父对象及其父对象，返回找到的第一个匹配组件。
+
+**模板参数：**
+- `T` - 组件类型
+
+**返回：** `T*` - 找到的组件指针，如果未找到则返回 nullptr
+
+## 相关文档
+
+- [GameObject 总览](game-object.md)
+- [GetComponentInChildren](get-component-in-children.md)