Use pre-commit-uv to speed up pre-commit hook environment installs

[tpvasconcelos]

Description

Another small step for the uv adoption tracked in #219 - this time on the pre-commit front.

Adds pre-commit-uv alongside pre-commit (in the pre-commit-* tox envs and in the local-dev dependency group), so that pre-commit builds its hook environments with uv instead of virtualenv+pip. No configuration changes are needed - the plugin activates automatically when installed next to pre-commit:

[INFO] Using pre-commit with uv 0.11.32 via pre-commit-uv 4.3.0

Locally validated: tox -e pre-commit-quick --recreate and tox -e pre-commit-all both pass, with all hook environments (cold install) built via uv in ~22s total.

Note on the remaining "pre-commit integration" checklist item in #219: the official uv pre-commit guide only covers the uv-pre-commit hooks (uv-lock, uv-export, pip-compile), all of which require a committed uv.lock or requirements files - neither of which this repo has (by design, after #388). So that item is blocked on the (separate) decision of whether to adopt a committed uv.lock. This PR covers what can be done on the pre-commit front today.

Related issues

Related to #219.

PR check list

• Read the contributing guidelines.
• Provided the relevant details in the PR's description.
• Referenced relevant issues in the PR's description.
• Added tests for all my changes. (N/A - dev tooling only)
• Updated the docs for relevant changes. (N/A)
• Changes are documented in docs/reference/changelog.md.
• The CI check are all passing, or I'm working on fixing them!
• I have reviewed my own code! 🤠

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📚 Documentation preview 📚: https://ridgeplot--396.org.readthedocs.build/en/396/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (4b7cf77) to head (1d82f1d).

Additional details and impacted files

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  Coverage   100.00%   100.00%           
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  Files           19        19           
  Lines          674       674           
  Branches        88        88           
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  Hits           674       674           

Flag	Coverage Δ
combined-src	100.00% <ø> (ø)

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