build: use ruff instead of isort, black, and flake8

[NyanKiyoshi]

Drops all the previous linters & formatters (isort, black, flake8) in favor of the modern alternative: ruff.

Changes Checklist

• The changes were tested (manually)
• The changes are tested automatically (pytest)
• The changes are optimized and clean
• The changes are documented:
  • The code is documented
  • The readme is up to date
  • The documentation (readthedocs) is up to date and tested

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.25%. Comparing base (4dc49fe) to head (4d130ae).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #58   +/-   ##
=======================================
  Coverage   96.25%   96.25%           
=======================================
  Files           7        7           
  Lines         347      347           
  Branches       42       42           
=======================================
  Hits          334      334           
  Misses          7        7           
  Partials        6        6           

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