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/get-rotation.md

@@ -0,0 +1,31 @@
+# GetRotation
+
+Get the world rotation of this transform.
+
+## Syntax
+
+```cpp
+Math::Quaternion GetRotation() const;
+```
+
+## Returns
+
+Returns the world rotation as a `Math::Quaternion`.
+
+## Remarks
+
+Returns the world-space rotation of this transform. If this transform has a parent, the world rotation is computed by combining the local rotation with the parent's world rotation.
+
+## See Also
+
+- [GetLocalRotation](get-local-rotation)
+- [SetLocalRotation](set-local-rotation)
+- [SetRotation](set-rotation)
+
+## Examples
+
+```cpp
+void Example(TransformComponent* transform) {
+    Math::Quaternion worldRot = transform->GetRotation();
+}
+```