There's really no way to add a file into the root directory as Corvid "sandboxes" the site and its directories.
You should find out if there is any other way to do this since not all environments allow access to the root directory.
Try to check out related forum post here to see if it can help.
Wishlist Page is the new official platform for requesting new features. You can vote, comment, and track the status of the requested features (requests from this page will be migrated to the new Wishlist soon).