More inventory fixes

src/items/throwable/ThrowableItem.cs

@@ -3,6 +3,7 @@ using Chickensoft.GodotNodeInterfaces;
 using Chickensoft.Introspection;
 using GameJamDungeon;
 using Godot;
+using System;
 using System.Linq;
 
 [Meta(typeof(IAutoNode))]
@@ -10,6 +11,8 @@ public partial class ThrowableItem : Node3D, IInventoryItem
 {
   public override void _Notification(int what) => this.Notify(what);
 
+  public Guid ID { get; } = new Guid();
+
   [Dependency] public IGameRepo GameRepo => this.DependOn<IGameRepo>();
 
   [Node] public IAnimationPlayer AnimationPlayer { get; set; } = default!;