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-id.md

@@ -0,0 +1,13 @@
+# GameObject::GetID
+
+获取游戏对象的唯一标识符。
+
+```cpp
+ID GetID() const;
+```
+
+**返回：** `ID` - 游戏对象的唯一标识符
+
+## 相关文档
+
+- [GameObject 总览](game-object.md)