Listenbrainz scrobbling (#1424)

* Refactor session_keys to its own package

* Adjust play_tracker

- Don't send external NowPlaying/Scrobble for tracks with unknown artist
- Continue to the next agent on error

* Implement ListenBrainz Agent and Auth Router

* Implement frontend for ListenBrainz linking

* Update listenBrainzRequest

- Don't marshal Player to json
- Rename Track to Title

* Return ErrRetryLater on ListenBrainz server errors

* Add tests for listenBrainzAgent

* Add tests for ListenBrainz Client

* Adjust ListenBrainzTokenDialog to handle errors better

* Refactor listenbrainz.formatListen and listenBrainzRequest structs

* Refactor agent auth_routers

* Refactor session_keys to agents package

* Add test for listenBrainzResponse

* Add tests for ListenBrainz auth_router

* Update ListenBrainzTokenDialog and auth_router

* Adjust player scrobble toggle

cmd/wire_injectors.go

@@ -9,6 +9,7 @@ import (
 	"github.com/google/wire"
 	"github.com/navidrome/navidrome/core"
 	"github.com/navidrome/navidrome/core/agents/lastfm"
+	"github.com/navidrome/navidrome/core/agents/listenbrainz"
 	"github.com/navidrome/navidrome/db"
 	"github.com/navidrome/navidrome/persistence"
 	"github.com/navidrome/navidrome/scanner"
@@ -24,6 +25,7 @@ var allProviders = wire.NewSet(
 	nativeapi.New,
 	persistence.New,
 	lastfm.NewRouter,
+	listenbrainz.NewRouter,
 	events.GetBroker,
 	db.Db,
 )
@@ -54,6 +56,12 @@ func CreateLastFMRouter() *lastfm.Router {
 	))
 }
 
+func CreateListenBrainzRouter() *listenbrainz.Router {
+	panic(wire.Build(
+		allProviders,
+	))
+}
+
 // Scanner must be a Singleton
 var (
 	onceScanner     sync.Once