Adding Kalendar to the KDE Gear release cycle

[Carl Schwan]

Hi :)

Could we get Kalendar inside KDE Gear? Kalendar is mostly stabilized
and need a fast release cycle anymore. More importantly, having our
release in sync with KDE PIM will help a lot in making sure that
a KDE PIM minor release won't break Kalendar silently and this would
also, allow us to move the new reminder service to Akonadi-calendar
and to share it with KOrganizer.

See https://mail.kde.org/pipermail/kde-pim/2022-February/048374.html

Cheers,
Carl