Use ruff for linting and formatting

[ericpre]

Progress of the PR

• Update CI,
• ruff check . pass,
• ruff check . --select NPY2011 pass,
• ruff format . pass,
• fix linting,
• [n/a] docstring updated (if appropriate),
• [n/a] update user guide (if appropriate),
• [n/a] added tests,
• add a changelog entry in the upcoming_changes folder (see upcoming_changes/README.rst),
• Check formatting of the changelog entry (and eventual user guide changes) in the docs/readthedocs.org:holospy build of this PR (link in github checks)
• ready for review.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.27%. Comparing base (18c289b) to head (d2e2c4a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #28   +/-   ##
=======================================
  Coverage   87.27%   87.27%           
=======================================
  Files           7        7           
  Lines         330      330           
  Branches       73       73           
=======================================
  Hits          288      288           
  Misses         25       25           
  Partials       17       17           

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