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_de.dart

@@ -2076,6 +2076,14 @@ class AppLocalizationsDe extends AppLocalizations {
   String get channelSecretHelp =>
       'Dieses Passwort muss mit allen Teammitgliedern geteilt werden, die Zugriff auf diesen Kanal benötigen';
 
+  @override
+  String get channelTypesInfo =>
+      'Hash-Kanäle (#team): Passwort automatisch aus dem Namen generiert. Gleicher Name = gleicher Kanal auf allen Geräten.\n\nPrivate Kanäle: Verwenden Sie ein explizites Passwort. Nur diejenigen mit dem Passwort können beitreten.';
+
+  @override
+  String get hashChannelInfo =>
+      'Hash-Kanal: Das Passwort wird automatisch aus dem Kanalnamen generiert. Jeder, der denselben Namen verwendet, wird demselben Kanal beitreten.';
+
   @override
   String get channelNameRequired => 'Kanalname ist erforderlich';