more Jellyfin integration work

backend/mediaprovider/jellyfin/jellyfinserver.go

@@ -0,0 +1,18 @@
+package jellyfin
+
+import (
+	jellyfinCli "github.com/dweymouth/go-jellyfin"
+	"github.com/dweymouth/supersonic/backend/mediaprovider"
+)
+
+type JellyfinServer struct {
+	jellyfinCli.Client
+}
+
+func (j *JellyfinServer) MediaProvider() mediaprovider.MediaProvider {
+	return newJellyfinMediaProvider(&j.Client)
+}
+
+func (j *JellyfinServer) Ping() bool {
+	return false // TODO: unimplemented
+}