[Feature] Add PEP 658 support to Pypi repo simple API

[ju2wheels]

Theres new API data used by tools like poetry that stemmed from PEP 658 that is not yet supported by Nexus.

[mrprescott]

Thanks for filing this, we've taken note of your interest. I'm leaving this open to see if there's other demand for this endpoint among other users.

[dolfinus]

pypi/warehouse#8254 lead to filling up metadata for all .whl files in PyPI, so new API can be used for most of packages. It is not yet clear what the total impact is (because backfill process took some time), some results can be found here pypi/warehouse#8254 (comment)

[tscheburaschka]

In our company this feature would offer a major speedup of the renovate workflow that aims to periodically upgrade all dependencies of a project. Since the feature is now offered by PyPi, the cost of using nexus compared to the baseline solution is growing and that makes it harder to defend it against other options.

[JoostvDoorn]

There is a lot of focus on speed and performance especially when it comes to lockfile generation going on now in the pypi & pip repo. It would be good for nexus to be compatible with PEP 658 & related improvements, see here: pypa/pip#12921

I have found that nexus was 6x slower than pypi when generating lockfiles using uv (with caching disabled using --no-cache). Command for reference: uv pip compile requirements.txt -o locked-requirements.txt --extra-index-url https://private_nexus_repo_url/repository/python-all/simple/