Draft: chore: replace flake8 by ruff

Simon Chabot requested to merge topic/default/ruff into branch/default

Hello dear contributors,

This is an auto generated modification to help you improve the code base of logilab. If this commit is bad don't hesitate to close this MR and report it here https://forge.extranet.logilab.fr/cubicweb/cube-doctor/-/issues.

Kind regards,

Edited by Simon Chabot

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