Proposal: archive KMplayer

[Nate Graham]

https://invent.kde.org/multimedia/kmplayer/-/commits/master?ref_type=heads

It appears to not have had any meaningful development in 3 years, and 
it's listed as "still in development and isn't released yet" on 
https://apps.kde.org/kmplayer.

It's not ported to Qt 6, the last release appears to have been 8 years 
ago, and the version on Flathub 
(https://flathub.org/apps/org.kde.kmplayer) is that old, with nearly 
every review on ODRS saying it's broken.

Since it looks like this app's development has stagnated and its current 
form is not working for users, I'd propose we archive it until someone 
wants to resume work and make a new working release, and remove it from 
Flathub until that time as well.


Nate