Add new resources and presenters for item pickups and effects

Code/Presenters/GamePresenter.cs

@@ -57,6 +57,7 @@ public partial class GamePresenter : Node
         _world.RegisterSystem(new AttributeSystem());
         _world.RegisterSystem(new PickupSystem());
         _world.RegisterSystem(new InventorySystem(_world));
+        _world.RegisterSystem(new ItemAcquisitionSystem(_world));
         
         _world.RegisterSystem(new WeaponSystem());
         _world.RegisterSystem(new ProjectileSystem());
@@ -75,7 +76,7 @@ public partial class GamePresenter : Node
         _presenters.Add(playerData.Entity.Id, playerData.Presenter);
         _presenterComponents.Add(playerData.Entity.Id, playerData.Components);
     }
-
+    
     public override void _Input(InputEvent @event)
     {
         _inputService?.HandleInputEvent(@event);