Add github action to automatically publish package to pypi on tag

[Dominic-DallOsto]

Copied from here

I think I needed to go here and create an environment called pypi

[jasper-tms]

I just got automatic publishing set up for npimage, here's my configuration: https://github.com/jasper-tms/npimage/blob/main/.github/workflows/publish.yml

I didn't need to create an environment, only add a repository secret via this page: https://github.com/NeLy-EPFL/DeepFly3D/settings/secrets/actions

I added the pypi token that Sibo gave me which works only for the nely-df3d pypi project as a token named DF3D_PYPI_API_TOKEN, so you can use

      - name: Publish to PyPI
        uses: pypa/gh-action-pypi-publish@release/v1
        with:
          password: ${{ secrets.DF3D_PYPI_API_TOKEN }}

in your yml and it should work. Want to give it a try?

Also note that I configured npimage to run the release action any time there's an edit to pyproject.toml, which is slightly different than what I think you had set up (to trigger any time we mark a new release?)