docs: replace pre-commit by prek in the contrib instructions

[joanise]

PR Goal?

Replace pre-commit by prek https://prek.j178.dev/

• prek uses uv to install hooks much faster
• built in Rust, with the explicit intent to be fast
• it can run the hooks in parallel when multiple files are affected
• it's a drop-in replacement requiring no other change than doing prek install instead of pre-commit install

Fixes?

my growing annoyance with pre-commit, and really, just cause all these new rust-based tools actually are nicer. :)

I've actually been using prek for months now, but I didn't to impose it on anyone. When I mentioned it to Samuel, he chided me for now sharing the joy, so this PR is me finally doing that sharing.

It's not a huge difference, but it's still enough difference I found it worth switching, especially given how trivial it is to switch.

How to test?

Install prek:

• redo pip install -e ".[dev]", or just do pip install prek, or even uv tool install prek` for a global install

Remove the pre-commit hook if you installed it before

rm .git/hooks/pre-commit

(Re-)install the hook:

prek install

Now commit some changes. prek will have to install everything in .pre-commit-config.yaml fresh, so the first time will be slow, though not nearly as slow as when using pre-commit, and subsequent times will be nice and fast.

Confidence?

high

Version change?

no

Related PRs?

EveryVoiceTTS/EveryVoice#798
NRC-ILT/g2p#490

[semanticdiff-com]

Review changes with  

[github-actions]

CLI load time: 0:00.05
Pull Request HEAD: 9433350af56a3985162ed3e353c6de1a3c895f7f
No imports take more than 0.1 s.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.76%. Comparing base (ed7b565) to head (9433350).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #303   +/-   ##
=======================================
  Coverage   93.76%   93.76%           
=======================================
  Files          21       21           
  Lines        1765     1765           
  Branches      295      295           
=======================================
  Hits         1655     1655           
  Misses         73       73           
  Partials       37       37           

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