Automate GitHub Release publication

[dsheets]

GitHub has a Releases feature. It would be nice to have creation of these releases automated by this tool and potentially filled with a changelog scraped from the archive using a forthcoming changelog library.

[yallop]

There's a changelog library here.

[erikmd]

I've just seen this issue; FYI you might be interested in the GHA workflow we developed with @yurug within this learn-ocaml PR :)

• feat(release.yml): Add a (3 jobs)-based GHA using release-please ocaml-sf/learn-ocaml#434

which (to sum up) automatically generates a Release PR with a ConventionalCommits-based Changelog, then upon merge of this PR, create a release with assets and run opam-publish (using a GH Personal Access Token).