v1.21.4

✨ Feat: Update workflow to include release action.

- Remove unnecessary comments and setup-gradle action
- Add release action for tagged commits
- Configure release action to publish JAR files

v1.20.6: ✨ Feat: Update to Paper 1.20.6 and improve resource handling.

- Update project version to 1.20.6-SNAPSHOT
- Update Paper API dependency to 1.20.6-R0.1-SNAPSHOT
- Add task to copy binary resources
- Improve plugin directory checking and resource loading
- Update database setting path initialization