feat: Implement command queue for BLE command handling

- Added BleCommandQueue to manage command serialization and responses in BleCommandSender.
- Updated writeData, writeDataAndWaitForAck, and writeDataAndWaitForResponse methods to utilize the command queue.
- Enhanced BleResponseHandler to complete commands based on responses received from the BLE device.
- Introduced new commands for channel management, including getChannel and setChannel.
- Created LocationTrailLayer and TrailControls widgets for displaying and managing location trails on the map.
- Added PermissionRequestDialog to handle location permission requests on app startup.
- Updated LocationTrackingService to allow GPS tracking without a BLE connection.

lib/l10n/app_localizations_en.dart

@@ -51,6 +51,10 @@ class AppLocalizationsEn extends AppLocalizations {
   String get locationPermissionPermanentlyDenied =>
       'Location permission permanently denied. Please enable in Settings.';
 
+  @override
+  String get locationPermissionRequired =>
+      'Location permission is required for GPS tracking and team coordination. You can enable it later in Settings.';
+
   @override
   String get locationServicesDisabled =>
       'Location services are disabled. Please enable them in Settings.';
@@ -701,6 +705,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get rooms => 'Rooms';
 
+  @override
+  String get channels => 'Channels';
+
   @override
   String get cacheStatistics => 'Cache Statistics';