feat: Add support for hash and private channels with corresponding UI updates

- Introduced new localization strings for channel types and their descriptions in Italian, German, Spanish, French, Croatian, Slovenian, and English.
- Updated the `AppProvider` to handle channel info reception, including deletion of channels and updating the UI accordingly.
- Enhanced `ChannelsProvider` to support channel removal and notify listeners.
- Modified `ConnectionProvider` to include methods for checking empty channel slots and deleting channels.
- Updated BLE service methods to handle channel deletion and verification.
- Improved the `AddChannelDialog` to differentiate between hash and private channels, including dynamic UI elements based on channel type.
- Added delete functionality for channels in the `ContactTile` widget with confirmation dialogs.
- Adjusted permission request dialog behavior to allow dismissing by tapping outside.

lib/l10n/app_localizations_en.dart

@@ -2056,6 +2056,14 @@ class AppLocalizationsEn extends AppLocalizations {
   String get channelSecretHelp =>
       'This secret must be shared with all team members who need access to this channel';
 
+  @override
+  String get channelTypesInfo =>
+      'Hash channels (#team): Secret auto-generated from name. Same name = same channel across devices.\n\nPrivate channels: Use explicit secret. Only those with the secret can join.';
+
+  @override
+  String get hashChannelInfo =>
+      'Hash channel: Secret will be auto-generated from the channel name. Anyone using the same name will join the same channel.';
+
   @override
   String get channelNameRequired => 'Channel name is required';