Unbreakable items can't have a max_stack_size component

Recently a change was made to max_stack_size and max_damage components so that they are now mutually exclusive, which takes into account the item's base durability (for example for a wooden pickaxe).

Even if you add the unbreakable component to this item, so it no longer has durability, you can still not add a max_stack_size to it, even though it would make sense if it could.