Adding support for notmuch-address --output=sender --output=date

[Edgar Hipp <contact@javascript-ninja.fr>]

Hello !

I really love the simplicity of notmuch.

I'm currently creating a script that uses the output of :

notmuch address --output=sender --output=count

I'd very much like to have a way to also know, for each address, when
was the last time I got or sent an email to that person.

Something like this : 

notmuch address --output=sender --output=count --output=date

Which would return : 

10	2022-10-27T16:12:00+02:00	contact@javascript-ninja.fr

I could do this manually in a script to search for each address, when
was the last email sent or received but this will obviously require one
call to notmuch for each address and take a lot of time.

Maybe one would need to use two flags : 

--output=date-first
--output=date-last

Where date-first would be the first date of contact (for example 2020-03-11T14:15:00+02:00)

And date-last the last date of contact (for example 2022-10-27T16:12:00+02:00)

Best,

Edgar