Add new resources and presenters for item pickups and effects

Code/Presenters/PickupPresenter.cs

@@ -21,6 +21,7 @@ public partial class PickupPresenter : Area3D, IEntityPresenter, IPresenterCompo
     {
         if (_presenterRegistry.TryGetEntity(body.GetInstanceId(), out var hitEntity))
         {
+            GD.Print($"Collision detected between {CoreEntity.Id} and {hitEntity.Id}");
             _world.AddComponent(hitEntity, new CollisionEventComponent(CoreEntity));
         }
     }
@@ -30,7 +31,6 @@ public partial class PickupPresenter : Area3D, IEntityPresenter, IPresenterCompo
         CoreEntity = coreEntity;
         _world = world;
         _presenterRegistry = GetNode<PresenterRegistry>("/root/PresenterRegistry");
-        BodyEntered += OnBodyEnter;
     }
 
     public void SyncToPresentation(float delta)