🔧 Update Ruff config to current lint schema

[Copilot]

Ruff was warning on deprecated top-level lint settings in pyproject.toml, and the config still ignored PT004, a rule Ruff has removed. This updates the config to Ruff’s current schema and drops the dead ignore.

• Config migration

  • Move select and ignore under [tool.ruff.lint]
  • Move pydocstyle settings under [tool.ruff.lint.pydocstyle]
  • Move isort settings under [tool.ruff.lint.isort]

• Rule cleanup

  • Remove PT004 from the ignore list since it no longer exists and has no effect

[tool.ruff.lint]
select = ["F", "E", "W", "I", "N", "D", "B", "A", "C4", "T20", "PT", "Q", "PTH"]
ignore = ["E501", "N818", "D1", "D205", "PT016"]

[tool.ruff.lint.pydocstyle]
convention = "google"

[tool.ruff.lint.isort]
known-first-party = ["gitmojis"]