When moving documents, the UI will query for all subdocuments so we know the list of things to move

In the UI, we should confirm with the user all of the documents that will be moved

Then, the move operation will be handled for all sub-documents. The move operation is to create a new ref for the new location and create a redirect ref on the old location.

Look into the logic for deleting, to see an example of querying for all children and showing the user all the document paths that will be affected