Switch to prek.toml

[adamtheturtle]

Summary

• Convert .pre-commit-config.yaml to prek.toml via prek util yaml-to-toml
• Remove the YAML config and update related ignore/CI references
• Validate with prek validate-config

See https://prek.j178.dev/configuration/#validation

Test plan

• CI lint / prek hooks pass
• prek validate-config prek.toml succeeds locally

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Note

Low Risk
Tooling-only config format change; hook set and stages look equivalent, with no application or security logic.

Overview
Migrates git hook configuration from .pre-commit-config.yaml to prek.toml (prek’s TOML format). The same repos, hook IDs, stages, and uv run --extra=dev entries are preserved.

The YAML uv==0.11.7 alias is inlined on each local hook. Vale’s long YAML comments are not carried over. check-manifest now ignores prek.toml instead of .pre-commit-config.yaml.

^{Reviewed by Cursor Bugbot for commit 8bff529. Bugbot is set up for automated code reviews on this repo. Configure here.}