New port: net-im/pidgin--icyque

ICQ informed users it stops supporting old official
and unofficial clients since 28 Decembet 2018.
Technically it may stop using old OSCAR protocol
in favour of new WIM protocol introduced some time ago.

This is a port of new Pidgin plug-in for ICQ(WIM) by Eion Robb
created day ago.

At present, it supports login and send/receive IM only
and has some rough edges. This is work in progress still.