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/update.md

@@ -0,0 +1,15 @@
+# GameObject::Update
+
+每帧更新游戏对象及其所有组件。
+
+```cpp
+void Update(float deltaTime);
+```
+
+**参数：**
+- `deltaTime` - 距离上一帧的时间（秒）
+
+## 相关文档
+
+- [GameObject 总览](game-object.md)
+- [LateUpdate](late-update.md)