v0.3.0

Changed

• ruff now ships with the package. It moved from the [tools]
  extra into the runtime dependencies, so uv add --dev tempest-cli is
  enough for lint, fix, format and fmt-check to run — no second
  install, and no dependency on uv being around to fetch one. The cost
  is nil: ruff is a static binary wheel with no Python dependencies of
  its own, so no bound of its reaches a consumer's resolution.

  mypy and pytest stay out on purpose. A mypy bump changes which
  errors a codebase reports and pytest has to match the suite and its
  plugins — those are the project's call. [tools] now installs exactly
  those two.

• The project's environment is searched before the CLI's own. With
  ruff bundled, the CLI's environment always has one; looking there
  first would silently override a version the project pinned whenever
  tempest-cli is installed apart from it (uv tool install, pipx).
  The order is now $VIRTUAL_ENV → nearest .venv → the CLI's own
  environment → PATH → uv run --with.