Finish refactoring other than making sure bonuses appear on player stat side

src/items/weapons/Weapon.cs

@@ -20,6 +20,8 @@ public partial class Weapon : Node3D, IInventoryItem, IEquipable
 
   [Node] public Area3D Pickup { get; set; } = default!;
 
+  public Guid ID => Guid.NewGuid();
+
   public void OnReady()
   {
     Sprite.Texture = WeaponStats.Texture;