New snapd-desktop-integration project to translate

[Sebastien Bacher]

Hey translators,

snapd-desktop-integration is used for some interactions between snapd 
and the user session. It's going to display notifications for things 
like theme installation or 'update available, close your software to 
have it refreshed to the current version'.

Those strings are user visible and should be translated, that can now be 
done on
https://translations.launchpad.net/snapd-desktop-integration

Cheers,
Sébastien Bacher