proposal - support tsv output format for psql

Hi

I am playing with clipboard on Linux, and I found a way, how to redirect
psql output to clipboard via wl-copy or xclip and then to Libre Office. Now
it looks so best format is tsv

select * from pg_database \g (format=tsv) | wl-paste -t
application/x-libreoffice-tsvc

Implementation of tsv format should not be hard.

What do you think about this?

Regards

Pavel