* Add tag aliases
* Document and rename tag alias internals
* Make the tag alias directory singular to match Mojang's recent style
* Add a note about tag aliases to client tag documentation
* Support missing tags in alias groups
* Support tag aliases for dynamic and reloadable registries
* TagAliasGroup: Document naming conventions for c tag alias groups
* Add tag alias test mod
* Fix inline return checkstyle
* Add test for tag alias data generation
* Fix checkstyle (again)
* Add tag translations to tag API testmod
* Uncomment accidentally commented out code
* SimpleRegistryMixin: Improve a log message
* TagAliasTest: Improve assertion messages
* Fix tag aliases for dynamic registries not applying on /reload
* Clean up log message once again
* Address review feedback
* Make missing interfaces throw CCEs
* Add README
* Move TagAliasGroup into the impl package
(cherry picked from commit a730659c14)
