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/transform-component/set-sibling-index.md

@@ -0,0 +1,27 @@
+# SetSiblingIndex
+
+Set the sibling index of this transform.
+
+## Syntax
+
+```cpp
+void SetSiblingIndex(int index);
+```
+
+## Parameters
+
+- `index` - The new sibling index.
+
+## See Also
+
+- [GetSiblingIndex](get-sibling-index)
+- [SetAsFirstSibling](set-as-first-sibling)
+- [SetAsLastSibling](set-as-last-sibling)
+
+## Examples
+
+```cpp
+void Example(TransformComponent* transform) {
+    transform->SetSiblingIndex(0);
+}
+```