[enhancement]: Make related tab on full screen player useful

Resolves #50. Adds a new set of components for fetching similar songs
from the current playing song. For Jellyfin, use the `/items/{itemId}/similar`
endpoint (may not work well for small libraries), and for Navidrome/Subsonic
use `getSimilarSongs`. _In theory_, this component can be used to get similar
songs anywhere.

src/renderer/features/player/components/full-screen-similar-songs.tsx

@@ -0,0 +1,13 @@
+import { SimilarSongsList } from '/@/renderer/features/similar-songs/components/similar-songs-list';
+import { useCurrentSong } from '/@/renderer/store';
+
+export const FullScreenSimilarSongs = () => {
+    const currentSong = useCurrentSong();
+
+    return (
+        <SimilarSongsList
+            fullScreen
+            song={currentSong}
+        />
+    );
+};