separate all utility headers and sources

cosets/include/window.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "glad/glad.h"
+#include <GLFW/glfw3.h>
+
+class Window {
+protected:
+   GLFWwindow *_window = nullptr;
+
+public:
+   virtual void init();
+
+   virtual void update();
+
+   virtual void render();
+
+   virtual void deinit();
+
+   void getBounds(int &width, int &height);
+
+   void swapbuffers();
+
+   void run();
+};