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-position.md

@@ -0,0 +1,33 @@
+# GetPosition
+
+Get the world position of this transform.
+
+## Syntax
+
+```cpp
+Math::Vector3 GetPosition() const;
+```
+
+## Returns
+
+Returns the world position as a `Math::Vector3`.
+
+## Remarks
+
+Returns the world-space position of this transform. If this transform has a parent, the world position is computed by combining the local position with the parent's world position.
+
+## See Also
+
+- [GetLocalPosition](get-local-position)
+- [SetLocalPosition](set-local-position)
+- [SetPosition](set-position)
+
+## Examples
+
+```cpp
+void Example(TransformComponent* transform) {
+    Math::Vector3 worldPos = transform->GetPosition();
+    XC_LOG_INFO("World position: ({}, {}, {})", 
+        worldPos.x, worldPos.y, worldPos.z);
+}
+```