Add additional checks to ruff

Here we can discuss whether we want to add additional rules to the ruff formatter.

• List of all available rules: https://docs.astral.sh/ruff/rules/

• Default ruleset: select = ["E4", "E7", "E9", "F"]

• Recommended ruleset: https://docs.astral.sh/ruff/linter/#rule-selection

  [tool.ruff.lint]
  select = [
      "B",   # flake8-bugbear
      "E",   # pycodestyle
      "F",   # Pyflakes
      "I",   # isort
      "SIM", # flake8-simplify
      "UP",  # pyupgrade
  ]

• Replace isort: extend-select = ["I"]

@martin.lang