How can I make a user to select a project folder in my application?

I need users to select a target project folder, that I will record on an object for some workflow (more precisely: So that they can request some operation to be done on this project folder).

I would like users to be able to select project in a dropdown. I don’t want to create an Object Type that list the projects available.

How can I have a dropdown in Workshop or Slate that list project folders ?

Bonus point if it shows only the ones the user has access to (Viewer, or even better, Editor).

This feature isn’t currently supported in Workshop