Make decor occupy individual inventory slots

items/catalog/basic_cube.tres

@@ -10,7 +10,7 @@ display_name = "basic cube"
 description = "a simple piece of decor for testing your RV layout."
 category = 6
 icon = ExtResource("2_icon")
-stackable = true
+stackable = false
 max_stack = 32
 usable = false
 equippable = true

items/item_data.gd

@@ -36,7 +36,6 @@ func is_valid() -> bool:
 		not item_id.is_empty()
 		and not display_name.strip_edges().is_empty()
 		and max_stack >= 1
-		and (stackable or max_stack == 1)
 	)