Reapply "Add mapping for synced lyrics tag"

This reverts commit a499899.

Author: phw

appendices/tag_mapping.rst

@@ -550,6 +550,21 @@ Lyrics :sup:`[4]`
    "RIFF INFO", "n/a"
 
 
+Synced Lyrics
+--------------
+.. csv-table::
+   :width: 100%
+   :widths: 37 100
+
+   "Internal Name", "``syncedlyrics:language:description``"
+   "ID3v2", "``SYLT:description``"
+   "Vorbis", "n/a"
+   "APEv2", "n/a"
+   "iTunes MP4", "n/a"
+   "ASF/Windows Media", "n/a"
+   "RIFF INFO", "n/a"
+
+
 `Media <https://musicbrainz.org/doc/Release_Format>`_
 ------------------------------------------------------
 .. csv-table::

tag_mapping.py

@@ -472,6 +472,17 @@
         "riff": "n/a",
     },
 
+    {
+        "tag_name": "Synced Lyrics",
+        "picard_name": "``syncedlyrics:language:description``",
+        "id3v2": "``SYLT:description``",
+        "vorbis": "n/a",
+        "apev2": "n/a",
+        "itunes": "n/a",
+        "wmp": "n/a",
+        "riff": "n/a",
+    },
+
     {
         "tag_name": "`Media <https://musicbrainz.org/doc/Release_Format>`_",
         "picard_name": "``media``",