[bugfix]: Handle top-level songs for Jellyfin (#553)

* [bugfix]: Handle top-level songs for Jellyfin

If a song is at the top level of a music folder, Jellyfin will not
group that into an album (See https://jellyfin.org/docs/general/server/media/music/).

This PR introduces a few changes:
- Gives tracks with no album ID a special route (`/dummy/${id}`)
- Gives a new route for dummy albums, warning about the error. This is designed to look _like_ the album detail page

* `are are` > `are`

* revert name changes

src/renderer/features/context-menu/context-menu-items.tsx

@@ -24,6 +24,13 @@ export const SONG_CONTEXT_MENU_ITEMS: SetContextMenuItems = [
     { divider: true, id: 'showDetails' },
 ];
 
+export const SONG_ALBUM_PAGE: SetContextMenuItems = [
+    { id: 'play' },
+    { id: 'playLast' },
+    { divider: true, id: 'playNext' },
+    { divider: true, id: 'addToPlaylist' },
+];
+
 export const PLAYLIST_SONG_CONTEXT_MENU_ITEMS: SetContextMenuItems = [
     { id: 'play' },
     { id: 'playLast' },