feat(ui): add 'Show in Playlist' context menu (#4139)

* Update song playlist menu and endpoint

* feat(ui): show submenu on click, not on hover

Signed-off-by: Deluan <deluan@navidrome.org>

* feat(ui): integrate dataProvider for fetching playlists in song context menu

Signed-off-by: Deluan <deluan@navidrome.org>

* feat(ui): update song context menu to use dataProvider for fetching playlists and inspecting songs

Signed-off-by: Deluan <deluan@navidrome.org>

* feat(ui): stop event propagation when closing playlist submenu

Signed-off-by: Deluan <deluan@navidrome.org>

* feat(ui): add 'show in playlist' option to options object

Signed-off-by: Deluan <deluan@navidrome.org>

---------

Signed-off-by: Deluan <deluan@navidrome.org>

ui/src/i18n/en.json

@@ -41,6 +41,7 @@
         "addToQueue": "Play Later",
         "playNow": "Play Now",
         "addToPlaylist": "Add to Playlist",
+        "showInPlaylist": "Show in Playlist",
         "shuffleAll": "Shuffle All",
         "download": "Download",
         "playNext": "Play Next",