🚀 Feature: Allow adding `run` steps before `prettier format` in CI

[JoshuaKGoldberg]

Feature Request Checklist

• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Overview

Some projects need to run commands in CI in the prettier task before running pnpm format --list-different. Example from JoshuaKGoldberg/prettier-plugin-curly#630 (comment): Prettier plugins that need to build first.

Additional Info

🎁

[github-actions]

🎉 This is included in version v2.24.0 🎉

The release is available on:

• GitHub releases
• npm package (@latest dist-tag)

Cheers! 📦🚀