Get KDE Software on Your Linux Distro wiki page

[Jonathan Riddell]

I've updated our three "binary packages" wiki pages with one page on
how to get our software on your distro.

https://community.kde.org/Get_KDE_Software_on_Your_Linux_Distro

Please check over the entry for your distro and update accordingly.  I
advise not including version numbers in the text as this will go out
of date.

https://phabricator.kde.org/T10176

Jonathan