Rework buildscript to work with maven publish

[wagyourtail]

rework of the buildscript to simplify so gradlew build will build forge/fabric jars together should (maybe?) improve build times for actions too and take away a bit of the confusion about getting baritone to build properly for x modloader

todo:

• [x] vanilla jar not remapping refmap properly (this is also an issue with the current buildscript and I'm trying to resolve it upstream #3378)
• [x] proguard not finding mixin dependency
• [x] actually setup maven publish
• [x] fix github actions and docker build
• [x] jitpack.yml
• [ ] back merge from 1.19

[wagyourtail]

https://jitpack.io/com/github/wagyourtail/baritone/c3c88c50d1/build.log :sunglasses:

[ZacSharp]

I'm not confident enough with gradle to review this properly so I'll just ask whether common/logs/latest.log is really supposed to be there.