Moves the implementation into the actual daemon. This opens the
possibility for different ways to expose these notifications depending on
where the libkdeconnect will be deployed.
REVIEW: 123076
Uses KPluginLoader+KPluginMetadata instead.
Describes plugins in json instead of desktop files. These desktop files are
then embedded into the .so file. All the plugins will be in a kdeconnect/
directory, and those will be the ones to look for.
Note it doesn't drop the KService dependency as KIOCore is a KDE Connect
dependency as well.
REVIEW: 123042
