Respackopts

This highly experimental release utilizes LibJF Config 3 for UIs. Due to this change, the mod can now theoretically be used server-side to configure data packs (though you'll have to modify the config files manually instead of using the UI). Due to how much the previous codebase was designed around cloth internals, some new bugs are very likely. While I have attempted to test most functionality, it is very likely that I have overlooked something. If you find any incompatibility (outside of translation keys changing, that is unavoidable), please inform me! Commits in alpha 4.0.0:

• Switch config UI backend to LibJF 3
• Support respackopts.json5 instead of assets/respackopts/conf.json
• Fix config file path
• Fix CI
• Switch to mdbook for docs
• Update README.md
• Switch environment to * since this should theoretically work serverside now