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
ReadAlongs/Studio#303

[codecov]

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[github-actions]

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Pull Request HEAD: d272b48cb312b4b5afd6de36e328230f5d464d01
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[roedoejet]

lgtm, thanks for adding!