BleachCraft: Rebirth Rubidium Fork

Don't report issues to any of the official sources.

- Adds shader support for build height up to ~512 and adds support for dynamic vertical chunk sections. 
- Meant to be paired alongside the BleachCraft: Rebirth "Soul Society" Dimension, giving rendering support to builds and entities above the normal vanilla 1.16.5 build height limit.

Credits: https://www.curseforge.com/minecraft/mc-mods/rubidium