Automate releases

[masklinn]

Useful as reference to external packagers, cf #19

There are a bunch of ways this could be handled tag first or bump first or have a workflow handle both (q: can a release be gated on various checks?)

• cargo semver-checks to check for correctness of new version
• create release / tags, may need multiple when cutting release as there are multiple crates / packages
• publish crates
• wheels release may need to be called as a sub-workflow? Or release triggered?