Adds the Universe Box block to the game.
These cannot be crafted, only found in dungeon, stronghold, or end-city chests.
When the box is placed you will find an opening in the top that leads into and enclosed pocket dimension.
You can break a Universe Box and move it somewhere else without losing the contents, it works sort of like a shulker box.
This mod depends on the Immersive Portals to function.
Massive thanks to qouteall for creating Immersive Portals and its API.
