Merge branch '1.20.1/dev' into 1.21.1/dev

Bump flywheel version

Merge branch '1.20.1/dev' into 1.21.1/dev

Bumps

- Bump versions
- Remove dead code in item model builder
- Update build badge in readme

Merge branch '1.20.1/dev' into 1.21.1/dev

# Conflicts:
#	buildSrc/src/main/kotlin/dev/engine_room/gradle/subproject/SubprojectExtension.kt
#	neoforge/build.gradle.kts
#	vanillinNeoForge/build.gradle.kts

Let me out!

- Add release parameter to jenkinsfile
- Add timeout to prevent locking up ci for ages if a build freezes

Merge branch '1.20.1/dev' into 1.21.1/dev

From You, 625 Commits Ago

- Drop -beta
- Fix common vanillin publishing version