Started implementing SFX

Fixed Shield animation jumps and secondary attack
Fixed demon wall stone behavior
Made overworld ambient sounds unpausable

Zennysoft.Game.Ma/src/items/InventoryItemStats.cs

@@ -74,4 +74,7 @@ public abstract partial class InventoryItemStats : Resource
   [Export]
   [Save("inventory_item_texture")]
   public Texture2D Texture { get; set; }
+
+  [Export]
+  public AudioStream AudioStream { get; set; }
 }