[Tidiness] Cron job to clean up empty folders

### TL;DR

Often times people will want to remove GitHub repos or GCP projects but that's actually a 2-3 PR process. Removing the main.tf file, realizing you have to set the policy to delete, then going back and cleaning up the empty folder.

It would be nice if there was a cron job that would go through and find dangling TF folders from deletion efforts and remove them. Or at the very least propose a PR for removing them.