[Bug c++/89326] [RFE] Highlight `required from here` in compile-error output

[Hi-Angel at yandex dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89326

--- Comment #2 from Konstantin Kharlamov <Hi-Angel at yandex dot ru> ---
Btw, I just occasionally noted: godbolt site adds their own highlight to GCC
output, in particular they highlight the whole line with "required from here"
with blue. Maybe something can be borrowed from them :)

https://godbolt.org/z/dK0CzG