filtering on whole _matched line_

[drestebon]

Usually, the way I use :Ag is to search for a string, and then fuzzy-search for something else, not necessarily a file name, but a second string.

This is possible with this change: ordinal = entry in line 31 of telescope-ag/lua/telescope/_extensions/ag.lua.

I have the impression that this was the default behavior in the original :Ag. It would be great to have this as an option.

Thank you for the great work.
Cheers!