Promoting fcitx5 to Factory

Hi,

Fcitx 5 has been in the M17N project for more than a year now, and it has an
5.0.0 release in November last year. Perhaps it's time to promote it into
the Factory, co-existing with Fcitx 4?

My personal experience spanning over 2 weeks is that fcitx5 seems to be the
only IME that works consistently on Sway (a Wayland window manager, also). IBus
falls a bit short when used with Firefox and Telegram Desktop. Having fcitx5
in Factory would make Sway users' live a bit easier by making it available
without an extra `zypper addrepo ...` step.


Best,
Shung-Hsi