Use hatchling as build backend by jeanas · Pull Request #2573 · pygments/pygments

@jeanas

This reduces tox's setup time, as measured on an environment with no
commands, from ~1.7s to ~0.8s.

It also fixes requirements.txt and tox.ini not being included in sdists
in spite of being part of the source tree.

This was referenced

Nov 21, 2023