feat: let user do something on each iteration

src/main.cpp

@@ -10,7 +10,10 @@ int main(int argc, char **argv) {
 	Renderer::GetInstance();
 
 	Window window(720, 480);
-	window.Run();
+
+	while (window.Running()) {
+
+	}
 
   return 0;
 }