feat: add file format library quality label

lib/screens/settings/library_settings_page.dart

@@ -435,6 +435,9 @@ class _LibrarySettingsPageState extends ConsumerState<LibrarySettingsPage> {
   }
 
   String _getQualityLabelModeLabel(BuildContext context, String mode) {
+    if (mode == AppSettings.libraryQualityLabelFileFormat) {
+      return context.l10n.libraryQualityLabelFileFormat;
+    }
     if (mode == AppSettings.libraryQualityLabelBitDepthOnly) {
       return context.l10n.audioAnalysisBitDepth;
     }
@@ -474,6 +477,11 @@ class _LibrarySettingsPageState extends ConsumerState<LibrarySettingsPage> {
         '${context.l10n.audioAnalysisBitDepth} & '
             '${context.l10n.trackConvertBitrate}',
       ),
+      (
+        AppSettings.libraryQualityLabelFileFormat,
+        Icons.audio_file_rounded,
+        context.l10n.libraryQualityLabelFileFormat,
+      ),
     ];
     showModalBottomSheet<void>(
       context: context,

lib/screens/settings/settings_search_catalog.dart

@@ -149,7 +149,16 @@ class SettingsSearchCatalog {
         SettingsSearchEntry(
           icon: Icons.graphic_eq_rounded,
           title: l10n.trackAudioQuality,
-          keywords: const ['quality label', 'bitrate', 'bit depth', 'kbps'],
+          keywords: const [
+            'quality label',
+            'bitrate',
+            'bit depth',
+            'file format',
+            'codec',
+            'flac',
+            'mp3',
+            'kbps',
+          ],
         ),
         SettingsSearchEntry(
           icon: Icons.library_music_outlined,