- Handle stairsplus stairs and MTG stairs in the same file.
- Only create stairs using stairsplus or MTG stairs, not both.
- Handle map switching from MTG stairs to stairsplus automatically.
- If using stairsplus:
- Move stairsplus nodes to proper namespace.
- Alias stairsplus nodes that moved to a new namespace.
- Alias duplicated ice and snowblock stairs and slabs to their new namespace.
- Make ice_brick sawable too.
- Unify stairsplus cut ice and default:ice texture brightness.
- If using MTG stairs:
- Move stairs and slabs to MTG stairs namespace.
- Alias stairs and slabs that moved to the new namespace.
