build: add support for python 3.11 and 3.12 and vendor upstream code

[mariajgrimaldi]

Description

This PR adds support for Python 3.11 and Python 3.12 in CI workflows.

As a part of this change we had to copy in some code from the https://github.com/EnTeQuAk/markey/ project. There is a README in the vendored folder that explains why we did that.

Resolves #149

[openedx-webhooks]

Thanks for the pull request, @mariajgrimaldi! Please note that it may take us up to several weeks or months to complete a review and merge your PR.

Feel free to add as much of the following information to the ticket as you can:

• supporting documentation
• Open edX discussion forum threads
• timeline information ("this must be merged by XX date", and why that is)
• partner information ("this is a course on edx.org")
• any other information that can help Product understand the context for the PR

All technical communication about the code itself will be done via the GitHub pull request interface. As a reminder, our process documentation is here.

Please let us know once your PR is ready for our review and all tests are green.

[mariajgrimaldi]

As mentioned in the issue ticket, this tool uses the lib markey: https://pypi.org/project/markey/, which looks unsupported. The library is used here: https://github.com/openedx/edx-platform/blob/master/conf/locale/babel_underscore.cfg#L1-L6

[openedx-webhooks]

@mariajgrimaldi 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.