Move some KCMs from plasma-desktop that are useful for Plasma Mobile

- formats KCM, it is useful for mobile to be able to configure various
things like number format, currency formats etc
- nightcolor KCM, it is also useful for mobile
- notifications KCM, currently not all options are useful for mobile,
but neverthless, this allows it to be used on Plasma Mobile

Moved from plasma-desktop at 7affae246d4a90ce53f3c5061f83567488928b96