Add "report formatting under cursor routing key" command #7106

See #7097 (comment)

This would be the ideal action for the Alva BC6 and other displays with second cursor routing keys. On other displays it could be something like NVDA+routing.

Technical from @jcsteh:

From an implementation perspective, I think we'd need to add a method to get a TextInfo from a routing index. Duplicating formatting reporting code in both globalCommands and braille sounds ugly to me.