fix: use standard paths for default lyrics dir

Also use capitalised lyrics dir for consistency with wallpaper dir

Author: soramanew

plugin/src/Caelestia/Config/userpaths.hpp

@@ -16,7 +16,8 @@ class UserPaths : public ConfigObject {
 
     CONFIG_GLOBAL_PROPERTY(
         QString, wallpaperDir, QStandardPaths::writableLocation(QStandardPaths::PicturesLocation) + u"/Wallpapers"_s)
-    CONFIG_GLOBAL_PROPERTY(QString, lyricsDir, QDir::homePath() + u"/Music/lyrics/"_s)
+    CONFIG_GLOBAL_PROPERTY(
+        QString, lyricsDir, QStandardPaths::writableLocation(QStandardPaths::MusicLocation) + u"/Lyrics/"_s)
     CONFIG_PROPERTY(QString, sessionGif, u"root:/assets/kurukuru.gif"_s)
     CONFIG_PROPERTY(QString, mediaGif, u"root:/assets/bongocat.gif"_s)
     CONFIG_PROPERTY(QString, noNotifsPic, u"root:/assets/dino.png"_s)