Add more pre-commit hooks

[maresb]

• no-commit-to-branch for main to enforce feature branches
• pyupgrade to keep style modern
• yesqa to remove redundant noqa comments
• ruff for fast linting
• flake8 plugins
  • flake8-builtins (already installed in dev dependencies)
  • flake8-comprehensions (already installed in dev dependencies)
  • flake8-mutable (already installed in dev dependencies)
  • flake8-use-fstring
  • flake8-use-pathlib

Also corresponding code cleanups to make everything pass.

Finally, eliminate dependencies on importlib-metadata and typing_extensions.

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[maresb]

This fails because the vendored Poetry monkeypatches subprocess.run.

The lesson: revendor Poetry first.

[maresb]

Superseded by #490