Lighting system now works and does illumination for the whole map plus entities, but not walls or multiple lights yet.

gui.cpp

@@ -227,6 +227,7 @@ void GUI::run_systems() {
   auto player = $world.get_the<Player>();
   System::motion($world, $game_map);
   System::enemy_pathing($world, $game_map, player);
+  System::lighting($world, $game_map, player);
   System::collision($world, player);
   System::death($world);
 }