Migrate jwcrypto packaging to Hatch

[iamdhakrey]

This PR migrates the project packaging from setuptools to Hatch, by introducing a complete pyproject.toml configuration and removing the legacy setup.py + VERSION file approach.

• Adds pyproject.toml with project metadata, dependencies, license, classifiers etc.
• Uses Hatch dynamic versioning, reading version from jwcrypto/version.py.
• Removes jwcrypto/VERSION files.
• Updates build targets to produce wheel and sdist correctly under Hatch.

Closes #304

[simo5]

Sounds like the 1st, 2nd and 4th commit should be squashed, and code changed to just import the version file.

[simo5]

I also do not see removal of setup.py here, should this PR marked as draft until all objectives are reached?
Or is your plan to keep setup.py and hatch support both available at the same time for now?

[iamdhakrey]

At the moment I’m keeping both setup.py and Hatch support to ensure a smooth transition. setup.py will be fully removed in a future PR.

[simo5]

LGTM,
the only thing I notice is that the first commit will not work w/o the second so may as well just squash them

[iamdhakrey]

LGTM, the only thing I notice is that the first commit will not work w/o the second so may as well just squash them

I’ve squashed the two dependent commits into a single one, as suggested.

[simo5]

TBH I do not remember what this file is used for, but VERSION is also referenced in MANIFEST.in and would need to be changed as well. Otherwise PR is good.

[iamdhakrey]

I've removed the VERSION reference from MANIFEST.in since it's no longer needed with dynamic versioning.Changes pushed

[simo5]

Thanks for the contribution!