New Plugin for SearchProvider

[badcel]

A plugin for SearchProviders should be able to enable / disable the searchprovider globally and per service.

The global setting should interact with the gnome-settings-daemon to avoid two settings for the same action in different places. The per service setting can be stored as array in gsettings.

Active SearchProviders are stored in: org.gnome.desktop.search-providers

Alternative 1: (search provider is no plugin, but custom application with settings inside webmusic): Create a new "Tab" in settings for search provider, possible options (gsettings):

• Enable dynamic search provider (static always on -> if so, disable completely via settings daemon)
• Limit number of results
• Set prefix to search for album / track / artist / show

Alternative 2: Just provide the gsettings, but no gui. It can be implemented if there is need from users

[badcel]

The searchprovider is a compile time option and can be disabled via the gnome settings if needed.