chore: Add github action to notify stale PRs

[github-actions]

Note

The pull request "chore: Add github action to notify stale PRs" was created by @andreiborza but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

[linear]

JS-1734

[github-actions]

A PR closing this issue has just been released 🚀

This issue was referenced by PR #19361, which was included in the 10.40.0 release.