Add contact settings and discovery features

- Implemented contact settings in localization files for Swedish, Ukrainian, and Chinese.
- Added new DiscoveryContact model to handle discovered contacts.
- Created DiscoveryScreen to display discovered contacts with filtering and sorting options.
- Integrated contact discovery storage to persist discovered contacts.
- Updated settings screen to include options for automatic contact addition.
- Enhanced app bar and list filter widgets for better user experience.
- Fixed variable naming inconsistencies in contact model.

lib/widgets/app_bar.dart

@@ -9,7 +9,16 @@ class AppBarTitle extends StatelessWidget {
   final String title;
   final Widget? leading;
   final Widget? trailing;
-  const AppBarTitle(this.title, {this.leading, this.trailing, super.key});
+  final bool indicators;
+  final bool subtitle;
+  const AppBarTitle(
+    this.title, {
+    this.leading,
+    this.trailing,
+    this.indicators = true,
+    this.subtitle = true,
+    super.key,
+  });
 
   @override
   Widget build(BuildContext context) {
@@ -23,10 +32,10 @@ class AppBarTitle extends StatelessWidget {
             : MediaQuery.sizeOf(context).width;
         final compact = availableWidth < 240;
         final showSubtitle =
-            !compact && connector.isConnected && selfName != null;
+            !compact && connector.isConnected && selfName != null && subtitle;
         final showBattery = availableWidth >= 60;
         final showSnr = availableWidth >= 110;
-        final showIndicators = showBattery || showSnr;
+        final showIndicators = (showBattery || showSnr) && indicators;
 
         return Row(
           mainAxisAlignment: MainAxisAlignment.start,