Project should use modern python packaging techniques

[FollowTheProcess]

Hello 👋🏻

I notice this repo still uses setup.py and has some potentially outdated config for modern python packaging. As far as I can tell it should be pretty easy to port to pyproject.toml using PEP621 and using the new PEP517 and PEP518 standards. There are no C extensions to build for instance.

In addition, the project might benefit from some of the more modern python toolset i.e.:

• Ruff for linting over pylint
• Introducing gradual typing with e.g. MyPy
• A modern package manager such as pdm or poetry (others are available too like hatch, flit etc.)

I'd be happy to submit a PR implementing some or all of the above depending on what you do/don't want to be included. I'd suggest the move to storing metadata in pyproject.toml and using the new packaging/build techniques as a minimum

See also: aws-cloudformation/cloudformation-cli#1083

Thanks!