Align Pip package metadata with the current specification

[popescu-v]

Description

Currently, Pip package metadata is specified in the setup.py file and contains a set of metadata fields, some of which are in line with the current Python package core metadata specification: https://packaging.python.org/en/latest/specifications/core-metadata/ .

The goal of this issue is to make all metadata fields conformant to the Python package core metadata specification.

Questions/Ideas

• Also, one should investigate whether the pyproject.toml file could completely supersede the setup.py file
  • A particular attention point here is the usage of versioneer as a way of calculating the current package version, based on its state in the Git repository.
• Solving this issue would allow e.g. pip show khiops to show correct and complete information regarding the khiops pure Python package.