Modernize the whole lib

[David-Guillot]

Hi @berhalak , @dsagal ,

The goal of this PR is not only to fix #4 , it's also to make contributing easier and restore trust of the community into this lib (probably also closing #5 ).

As you can see, the Github CI is passing for all currently supported Python versions, and modern tooling has been setup. The only thing I was not able to test is packaging/distribution, but it should work out-of-the box as I just copy/pasted some configuration from other projects.

This is of course only the beginning, as something could also be done with ruff, setting up a CONTRIBUTING.md file, more docs...

Let me know what you think about it!

[dsagal]

Hi @David-Guillot, this is excellent, thank you for doing this, and apologies for taking so long to get to this. @berhalak, I feel this can be landed as is, and then we'll probably want to follow up with some cleanup. I am thinking:

• Update README.md to document new test/build/publish instructions (we could drop justfile then, and probably drop twine as well since uv can do that job).
• Publish the new version.
• Look into modernizing (or at least updating) generated documentation.
• Other things @David-Guillot mentioned (ruff for linting, CONTRIBUTING.md, more docs)