Promote default tasks to Project and/or Workspace level

I have been using and loving the repository-level default tasks feature. However, now that my team has iterated and decided on which default tasks provide the most value, I now have to add them to over 20 repos individually.

This, then, is a low-priority feature request to also allow the default tasks at the Project or Workspace level, which will populate PRs on all repos underneath the parent with these defaults, in addition to any specified on each individual repo.