Port formats KCM to qml
Port formats kcm to qml for use in Plasma Mobile. There are some different appearance and behavior with original QWidget kcm:
- use detailed option are deprecated
- the locale list is no longer sorted, use filter instead
- examples are no longer grouped
- collate and sorting example is added
I use lazy initialization a lot, but the performance is somewhat on pair with the widget one. Also the filter option may be laggy on pinephone, but that's the best I can do. @teams/vdg