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/weapons/WeaponStats.cs

@@ -20,4 +20,7 @@ public partial class WeaponStats : InventoryItemStats
   [Export]
   [Save("weapon_tag")]
   public WeaponTag WeaponTag { get; set; } = WeaponTag.None;
+
+  [Export]
+  public SoundEffect SoundEffect { get; set; } = SoundEffect.WeaponSwing;
 }