feat(publish) : create GHA that automates all publication steps and updates the database

[Josverl]

• [x] need to decide if there is any use / need to use one of the poetry publish actions, or that the poetry cmdline is just as good for this
  • [x] start using poetry cmdline for simplicity and initial debugging
  • [x] destination PyPi / test-PyPi ( can be based on branch later on )
• [x] in which Repo should this GHA workflow run ->: Stubs
• [x] GH releases are not very useful in a multi-repo , ->: do not use releases
• [x] decide if to check in all the sources of each stub (seems like a useful thing for troubleshooting)
• [x] commit updates to the json DB directy https://github.com/EndBug/add-and-commit
  • [x] avoid conflicts between different versions running in parallel
  • [x] run build in matrix
  • [x] run publish in matrix