Automate release with JReleaser

[filiphr]

Add JReleaser for automating the release and add a step for automating the publishing of the website

This has been heavily inspired by the Moditect and JReleaser release procedures.

Not sure if @aalmiray, the creator of JReleaser, might be able to chime in and let us know if I'm doing something incorrectly here. Not sure what the best approach would be to test this with an actual Maven release.

I think doing the 1.6.0.Beta2 release would be a good first try for this.

Closes #3602

[aalmiray]

FWIW you can test most of the release configuration locally. You may run mvn jreleaser:jreleaserConfig to print out the resolved configuration. You may also run a release in dry run mode.

More tips can be found at https://jreleaser.org/guide/latest/checklist.html

[filiphr]

Thanks a lot for the comments @aalmiray. I was already trying it with the dry run locally and it looked like it is working correctly.

Thanks a lot for your work on JReleaser, I think automating the release is going to make us release faster 😄