feat: add firstpersoncontroller

lightkeeper/include/Lightkeeper.h

@@ -10,6 +10,7 @@
 #include "destrum/Graphics/Resources/Cubemap.h"
 #include "destrum/ObjectModel/GameObject.h"
 
+class FirstPersonController;
 class LightKeeper final : public App {
 public:
     LightKeeper();
@@ -39,6 +40,8 @@ private:
     std::unique_ptr<CubeMap> skyboxCubemap;
 
     GameObject* capybara = nullptr;
+    GameObject* m_Player = nullptr;
+    FirstPersonController* m_FPSController = nullptr;
 
     char scenePath[512]{"scenes/debug_scene.json"};
     char newSceneName[128]{"EmptyScene"};