Bring CI up to date

[rr-]

The linter job fails with:

- [extras.pipfile_deprecated_finder.2] 'pip-shims<=0.3.4' does not match '^[a-zA-Z-_.0-9]+$'

I believe it can be resolved by updating the dependencies in .pre-commit.

Also, we should drop unsupported Python versions, and add support for Python 3.11 to the CI matrix. The changes should be reflected in Python version pins inside pyproject.toml as well.

[LecrisUT]

Hi really like the idea of this project, great work on parsing the sphinx style documentations, that's exactly what I was looking for.

Quick unrelated comment, could the RST format be aliased as Sphinx as well?

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Would you like some help bringing the CI and tools up to date? Let me know what you think about:

• [ ] Fix the CI actions
• [ ] Migrate the documentations to RTD
• [ ] Add release workflow (optional: having dynamic versioning?)
• [ ] Switch backend to hatchling or setuptools (so that it's PEP517 compatible and more in-line with PEP621)
• [ ] Switch linters to ruff
• [ ] Add mypy pre-commit. Technically having it in pre-commit can be a bit flaky, but if you don't care about doing the checks for different python versions and dependency versions, it should be safe