Keyboard shortcut for starring files
When working with a lot of documents, the recently used section of nautilus becomes cluttered. So for people that want to curate a list of files they can access quickly, the starred file functionality is great. But for people that use nautilus mainly with the keyboard and less with the mouse using the popover / context menu is more cumbersome.
Bookmarking a folder which is kinda the equivalent to starred files already got a shortcut (ctrl+d).
Pressing a shortcut adds the selected file(s) to favourites / starred files.
Benefits of the solution
It would allow users to add files faster to the starred files section of nautilus.