beginning of adding Jellyfin support

backend/mediaprovider/jellyfin/jellyfinmediaprovider.go

@@ -0,0 +1,24 @@
+package jellyfin
+
+import (
+	"errors"
+
+	"github.com/dweymouth/go-jellyfin"
+)
+
+type jellyfinMediaProvider struct {
+	client          *jellyfin.Client
+	prefetchCoverCB func(coverArtID string)
+}
+
+func (j *jellyfinMediaProvider) SetPrefetchCoverCallback(cb func(coverArtID string)) {
+	j.prefetchCoverCB = cb
+}
+
+func (jellyfinMediaProvider) CreatePlaylist(name string, trackIDs []string) error {
+	return errors.New("unimplemented")
+}
+
+func (j *jellyfinMediaProvider) DeletePlaylist(id string) error {
+	return j.client.DeletePlaylist(id)
+}