Rework game over logic and game initialization

Zennysoft.Game.Ma/src/items/dropped/DroppedItem.cs

@@ -1,17 +1,10 @@
 using Chickensoft.AutoInject;
-using Chickensoft.GodotNodeInterfaces;
 using Chickensoft.Introspection;
 using Godot;
-using Zennysoft.Game.Implementation;
 using Zennysoft.Ma.Adapter;
 
 namespace Zennysoft.Game.Ma;
 
-public interface IDroppedItem : IRigidBody3D
-{
-  void RescueItem();
-}
-
 [Meta(typeof(IAutoNode))]
 public partial class DroppedItem : RigidBody3D, IDroppedItem
 {