ListenBrainz: Love export and basic import

Love import currently works only for tracks with existing recording MBID

backends/listenbrainz/models.go

@@ -52,6 +52,41 @@ type Track struct {
 	ArtistName     string         `json:"artist_name"`
 	ReleaseName    string         `json:"release_name"`
 	AdditionalInfo map[string]any `json:"additional_info"`
+	MbidMapping    MbidMapping    `json:"mbid_mapping"`
+}
+
+type MbidMapping struct {
+	RecordingName string   `json:"recording_name"`
+	RecordingMbid string   `json:"recording_mbid"`
+	ReleaseMbid   string   `json:"release_mbid"`
+	ArtistMbids   []string `json:"artist_mbids"`
+	Artists       []Artist `json:"artists"`
+}
+
+type Artist struct {
+	ArtistCreditName string `json:"artist_credit_name"`
+	ArtistMbid       string `json:"artist_mbid"`
+	JoinPhrase       string `json:"join_phrase"`
+}
+
+type GetFeedbackResult struct {
+	Count      int        `json:"count"`
+	TotalCount int        `json:"total_count"`
+	Offset     int        `json:"offset"`
+	Feedback   []Feedback `json:"feedback"`
+}
+
+type Feedback struct {
+	Created       int64  `json:"created"`
+	RecordingMbid string `json:"recording_mbid"`
+	RecordingMsid string `json:"recording_msid"`
+	Score         int    `json:"score"`
+	TrackMetadata Track  `json:"track_metadata"`
+	UserName      string `json:"user_id"`
+}
+
+type StatusResult struct {
+	Status string `json:"status"`
 }
 
 func (t Track) Duration() time.Duration {