Hologram Generator

Unzip the Hologram Generator into the datapacks folder to set up, then run `/function hologram:get_book` to get started!

Inspired by the recent mysticat video: https://www.youtube.com/watch?v=osOP-Gjl4HE

Adds to the concept with a system for storing blocks as nbt, and by adding workarounds for signs, skulls, banners, fluids, decorated pots, bells, chests, and beds, which don't render normally in block displays.