fix: definitive PyPI metadata fix - license_files in [metadata] + pyp…

…roject.toml build-system only

Root cause: license_files= was in [options] section of setup.cfg (silently ignored).
Must be in [metadata] section where ConfigMetadataHandler reads it.

pyproject.toml with [build-system] only (no [project]) is safe alongside setup.py -
this is the standard pattern used by lxml, numpy, etc.

packaging>=24.2 in twine install handles License-File field correctly.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

Merge branch 'master' of https://github.com/ratal/mdfreader

Added attachment example in README.md

Merge pull request #171 from fschuetz04/patch-1

Correct arguments for mdfreader.Mdf in readme

multiple documentation improvements

adjust C with pyx, missed at commit

Merge branch 'dev'

fixed bug for unit32 not aligned data on 4 bytes but with less than 3…

…2 bitcount

Initialised for 2.7.7

updated setup.py warning for in case of no cython installed