CI: Automatic release workflow

[KennethEnevoldsen]

It might be ideal to set up an automatic release schedule to pipy as well as automatic version bump.

This requires us to make a few decisions:

1. Decide on a versioning style, we can use either SemVer, calver, or some simple heuristic like "always bump minor version". I generally recommend the simple heuristic or calver as it does not require anything from the user.
2. it requires some pypi authentication (@Muennighoff can you set up trusted publishing or alternative invite me to the pypi org)

@Muennighoff , @imenelydiaker what are your thoughts? (I can set it up once we agree)

[Muennighoff]

Cool idea! I don't have rights to invite / set it up - I think @nreimers has - could you give me rights?

[KennethEnevoldsen]

@Muennighoff any updated here?

[Muennighoff]

I think it is only @nreimers who has rights and unfortunately I couldn't reach him thus far :(

[Muennighoff]

Resolved & invited you to the project 😊

[KennethEnevoldsen]

Added in #288