settings_menu: Create a dedicated class for the settings

includes/render.hpp

@@ -2,10 +2,12 @@
 * File name: render.hpp
 * Author: lejulien
 * Date created: 10-01-2026 21:54:12
-// Date modified: 10-01-2026 22:00:37
+// Date modified: 12-01-2026 21:56:03
 * ------
 */
 
+#include <memory>
+
 #include "world.hpp"
 
 #pragma once
@@ -16,7 +18,7 @@ public:
   Render(int cell_size);
 
   // Member function
-  void display(World *world);
+  void display(std::shared_ptr<World> world);
   void updateCellSize(int new_size);
 
 private: