(📚) Provide documented best practices for poetry integration with GitHub Actions

[KotlinIsland]

• [x] I have searched the issues of this repo and believe that this is not a duplicate.

Issue

I want to use Poetry in GitHub actions, what are the best practices for configuring this?

[Secrus]

The way Poetry and surrounding projects (tomlkit, cleo, poetry-core) have GH Actions set up, might be a good reference point.

[yozachar]

@abatilo provides abatilo/actions-poetry, but it uses pip. [python-poetry.org/docs/#ci-recommendations]

Would it be a good idea if the repository was forked under python-poetry as python-poetry/actions, so that the load of maintenance is shared?

[abatilo]

I would be happy to contribute it if there's interest.