Rework enemy behavior (still in progress but shouldn't crash)

Zennysoft.Game.Ma.Implementation/Item/InventoryItem.cs

@@ -16,7 +16,7 @@ public abstract partial class InventoryItem : Node3D
   [Save("inventory_item_spawn_rate")]
   public abstract float SpawnRate { get; }
   [Save("inventory_item_throw_damage")]
-  public abstract double ThrowDamage { get; }
+  public abstract int ThrowDamage { get; }
   [Save("inventory_item_throw_speed")]
   public abstract float ThrowSpeed { get; }
   [Save("inventory_item_tag")]