Bookshelf

• Merge branch '1.21.1' of https://github.com/Darkhax-Minecraft/Bookshelf into 1.21.1
• Add a way to register new sounds.

This project is made possible by Patreon support from players like you. Thank you!

• lothrazar
• Spencer Gilbert
• Tobias Ward
• techsquirrel
• Pongo Sapiens
• noobanidus
• Darkosto