Archiving org.kontalk

Kontalk is a chat client without upstream releases since July 2020 and without commits since October 2021.

Quoting the maintainer from October 2024 in GH issue 1321

You're right, I've been largely absent (life stuff and other projects). Kontalk is still in production but it won't last long - I promised myself to shut the Zeta server down by the end of the year but it'll probably last a few more months.

I'll make sure to make the necessary steps to warn people and provide closure.