CD pipeline to publish on Pypi

[mmerklinger]

This PR adds a CD pipeline to publish on Pypi.

Changes

• Moves pypi configuration file to dedicated directory.
• Adds workflow file for Pypi. The workflow requires the PYPI_TOKEN variable to contain the secret to publish on Pypi.
• Removes the Pypi workflow from the .gitlab-ci.yml file.

Checklist

Make sure to run make check and make fix before creating a PR, otherwise the CI will fail.

• [ ] tested with Python3.9
• [x] signed commits
• [ ] updated documentation (e.g. parameter description, inline doc, docs.nitrokey)
• [ ] added labels

Test Environment and Execution

• OS:
• device's model:
• device's firmware version:

Relevant Output Example

Fixes #

[mmerklinger]

I left in the jobs for the Gitlab CI. Should I remove them?

[robin-nitrokey]

I’m in favor of removing the unused Gitlab CI scripts. If we migrate back to Gitlab, we can still find them in the Git history.

[daringer]

yip please remove the gitlab toolchain

[mmerklinger]

Build and publish jobs from .gitlab-ci.yml file removed.

[daringer]

lgtm merge?

[mmerklinger]

From my side the issue is finished. You need to merge though.