Revert "Empty"

This reverts commit b98fdd0f29.

scripts/Item/ItemStack.gd

@@ -0,0 +1,8 @@
+class_name ItemStack
+
+var item:Item;
+var quantity:int;
+
+func _init(item:Item, quantity:int = 1):
+	self.item = item;
+	self.quantity = quantity;