Add support audio and video calls
More and more Kirigami/Maui applications are being created recently in the KDE world. One of them is Kaidan.
Adding audio/video calling support would bring advantages to the KDE world:
- Good support for internet telephony on Plasma Mobile
- Solving the problem of inequality of messaging experience on desktop and mobile
QXmpp seems to have support for it, so please consider adding support for it!