Setuptools

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No significant changes.

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Features
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- Merged with pypa/distutils55982565e, including interoperability improvements for rfc822_escape (pypa/distutils213), dynamic resolution of config_h_filename for Python 3.13 compatibility (pypa/distutils219), added support for the z/OS compiler (pypa/distutils216), modernized compiler options in unixcompiler (pypa/distutils214), fixed accumulating flags bug after compile/link (pypa/distutils207), fixed enconding warnings (pypa/distutils236), and general quality improvements (pypa/distutils234). (4298)

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Bugfixes
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- Remove attempt to canonicalize the version. It's already canonical enough. (4302)

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Features
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- Support PEP 625 by canonicalizing package name and version in filenames
per
`the spec <https://packaging.python.org/en/latest/specifications/source-distribution-format/#source-distribution-file-name>`_.
Projects whose names contain uppercase characters, dashes, or periods will
now see their sdist names normalized to match the standard and the format
previously seen in wheels. For example:

- ``zope.interface`` -> ``zope_interface``
- ``CherryPy`` -> ``cherrypy``
- ``foo-bar_baz`` -> ``foo_bar_baz``

Projects are encouraged to adopt this change to align with standards and
other backend build systems. (3593)

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Features
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- Explicitly use ``encoding="locale"`` for ``.pth`` files whenever possible,
to reduce ``EncodingWarnings``.
This avoid errors with UTF-8 (see discussion in python/cpython77102). (4265)


Bugfixes
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- Clarify some `pkg_resources` methods return `bytes`, not `str`. Also return an empty `bytes` in ``EmptyProvider._get`` -- by :user:`Avasam` (4243)
- Return an empty `list` by default in ``pkg_resources.ResourceManager.cleanup_resources`` -- by :user:`Avasam` (4244)
- Made ``pkg_resoursces.NullProvider``'s ``has_metadata`` and ``metadata_isdir`` methods return actual booleans like all other Providers. -- by :user:`Avasam` (4254)


Misc
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- 4237, 4238, 4241, 4260, 4261, 4263

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Bugfixes
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- Fix argument order of ``--config-settings["--build-option"]`` arguments.
This was broken by <https://github.com/pypa/setuptools/pull/4079>`. (#4217)


Misc
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- 4231