add Deezer support

[Asuniia]

Deezer has a simple API : https://developers.deezer.com/api

[itsnotalexthere]

I'm wondering if it is still in mind to add it, great mod, but lacks services!

[ThatGravyBoat]

Deezers api doesnt allow the retreval of the current song a person is listening to which is why I marked it as Service/no-api and deezer doesnt seem to have updated their api so until that happens I cant support it.

[itsnotalexthere]

The search for the API

Resulted in only the JS sdk

The JS sdk part

// Callback function is called when the currently playing track has changed
DZ.Event.subscribe('current_track', function(track, current_track){
console.log("Currently playing track", track);
});

Additionnal Info

There are more events offered by the SDK:
player_play
player_paused
track_end

[ThatGravyBoat]

the JS api was deprecated and is no longer maintained https://en.deezercommunity.com/features-feedback-44/help-wanted-deezer-javascript-sdk-is-no-longer-maintained-75670