feat: refactor and move out the renderer with entt registry + better event system

engine/include/engine/renderer/renderer.h

@@ -2,8 +2,8 @@
 #define RENDERER_H_
 
 #include <glm/glm.hpp>
-#include <entt/entity/registry.hpp>
 
+#include "engine/scene/scene.h"
 #include "engine/renderer/shader.h"
 #include "engine/export.h"
 #include "engine/components/light.h"
@@ -11,23 +11,23 @@
 // TODO: make static or singleton
 class ENGINE_API Renderer {
 public:
-    Renderer(entt::registry& registry);
+    Renderer(std::shared_ptr<Scene> scene);
 
     void Render();
     void Init();
-    void GenerateShadowMaps();
 
     void OnWindowResized(int w, int h);
 private:
     void ApplyLights(Shader &shader);
     void UpdateView();
     void RenderScene(Shader &shader);
+    void GenerateShadowMaps();
     void EnsureShadowResources(light& l);
 private:
     Shader m_shader;
     Shader m_depthShader;
 
-    entt::registry& m_registry;
+    std::shared_ptr<Scene> m_scene;
 
     // unsigned int m_depth_fbo;
     // unsigned int m_depthMap;