This updates KDE Plasma 6 to the first stable release.
Update plan for the rest of KDE:
* The KDE Applications will be updated to 24.02 at the beginning of the
next quarter in the tree. They will be mostly Qt6 based.
To test them beforehand, one can use the overlay [1].
* The idea is to wait out the first patch-release for the applications,
which should hopefully get rid of most of the new bugs.
* The Qt5 bases KDE Frameworks 5 and Plasma 5 ports should remain in the
tree for the next quarter -- Frameworks as long as it is required by
other ports. The Plasma 5 ports will likely be removed at some point
in the future however -- as there is no apparent benefit in having
multiple Plasma versions at the moment.
* The Qt6 based KDE applications will replace the current Qt5 based
ports. As the maintenance overhead for duplicate is not manageable.
* For co-instability the KDE Frameworks 5 ports will be adapted to
depend on the KDE Frameworks 6 ports as described in [2].
* This plan is not fixed in stone, but will be adapted when it seems
reasonable to do so.
Announcement: https://kde.org/announcements/megarelease/6/
[1] https://github.com/tcberner/kde6-overlay
[2] https://community.kde.org/Frameworks/6.0_Release_notes#Coinstallability
