fix pyproject.toml: add minimal [project] table required by setuptools validation

[tool.setuptools] without [project] causes validation error in all setuptools versions.
name+version in [project] satisfies the validator; all other metadata stays in setup.py.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ratal

pyproject.toml

@@ -2,5 +2,9 @@
 requires = ["setuptools>=68,<76", "wheel", "Cython>=3.0", "numpy>=1.14"]
 build-backend = "setuptools.build_meta"
 
+[project]
+name = "mdfreader"
+version = "4.2"
+
 [tool.setuptools]
 license-files = []