settings_menu: Create a dedicated class for the settings

src/render.cpp

@@ -2,7 +2,7 @@
 * File name: render.cpp
 * Author: lejulien
 * Date created: 10-01-2026 21:49:04
-// Date modified: 10-01-2026 21:59:56
+// Date modified: 12-01-2026 21:54:56
 * ------
 */
 
@@ -71,7 +71,7 @@ void Render::display_world(std::vector<bool> *data, int width, int height) {
 
 // Render loop
 
-void Render::display(World *world) {
+void Render::display(std::shared_ptr<World> world) {
   display_world(world->getWorldData(), world->getWidth(), world->getHeight());
 }