Improve auto-generated release-notes
Improve auto-generated release-notes

Adding an initial `.github/release.yml` file similar to https://docs.github.com/en/repositories/releasing-projects-on-github/automatically-generated-release-notes#example-configuration

This will allow the auto-generated release-notes for new project releases to be more useful, by grouping and categorizing all PRs.

agoravoting/agora-release,agoravoting/agora-release