Axolotls Ignore Passives [PurpurPack]

Starts preparing support easier updating. Adds a 'version_info.txt' file. Also adds 'support' for 1.21.1, though not particularly necessary

Update to 1.21 to use the new tag folder names

Update to add support for 1.20.5, no other changes

Update to 1.20.3

Update to 1.20.2

• Update to support 23w31a
• I will be marking snapshot updates as 'beta' - they should work but as all things in snapshots, they may not work as intended

Initial release