Add 1.21 data

[rom1504]

No description provided.

[rom1504]

this can be done by running https://github.com/PrismarineJS/minecraft-jar-extractor/blob/master/image_names.js

yes really that's it

anyone feel like doing it?

[Icyadam14]

I'm happy to help out here. I'd love to get this repo up to date so that we can get prismarine-viewer up-to-date. The only problem is the current npm release of node-minecraft-data only has data for 1.21.1, not 1.21. I will create a PR shortly with the 1.21.1 data.