Migrate from pre-commit to prek

[eifinger-bot]

Summary

Migrate the project from pre-commit to prek - a faster, Rust-based drop-in replacement.

Changes

• Replace pre-commit and pre-commit-hooks dependencies with prek>=0.3.0
• Add prek's builtin hooks for common checks (trailing-whitespace, end-of-file-fixer, check-yaml, check-json, check-toml, check-merge-conflict, detect-private-key, check-executables-have-shebangs, check-symlinks)
• Remove duplicate local hooks that are now covered by builtin
• Update CI workflow to cache ~/.cache/prek and run rye run prek run --all-files
• Update actions/cache to v4

Benefits

• ⚡ Faster hook execution with Rust-native implementations
• 📦 Single binary without Python runtime dependency
• 🚀 Automatic fast path for supported hooks
• 💾 Better performance and disk space usage

Notes

• This project uses rye instead of uv, so commands use rye run
• Local hooks kept: codespell, mypy, pytest, yamllint (require their respective packages)
• Uses prek's builtin hooks for all pre-commit-hooks replacements