title: github check suite to enforce a minimum pull request review period
body: <p>Our project has maintainers and reviewers with a 12 hour time difference. We have agreed to allow PRs to remain open for at least 24 hours so that everyone has a chance to review and comment. Unfortunately, this is easy to forget or overlook, especially for small PRs.</p>
  <p>We would like to automate this as a check.</p>
  <p>Is there an existing action, app, or check suite to enforce a minimum PR review period? (I am not interested in writing my own.)</p>