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/widgets/permission_request_dialog.dart

@@ -93,8 +93,13 @@ class _PermissionRequestDialogState extends State<PermissionRequestDialog> {
   @override
   Widget build(BuildContext context) {
     return PopScope(
-      // Prevent dismissing dialog by tapping outside
-      canPop: false,
+      // Allow dismissing dialog by back button or tapping outside
+      canPop: true,
+      onPopInvokedWithResult: (didPop, result) {
+        if (didPop) {
+          widget.onPermissionsDenied?.call();
+        }
+      },
       child: AlertDialog(
         title: Row(
           children: [
@@ -162,14 +167,14 @@ class _PermissionRequestDialogState extends State<PermissionRequestDialog> {
           ],
         ),
         actions: [
-          if (_errorMessage != null && !_isRequesting)
-            TextButton(
-              onPressed: () {
-                Navigator.of(context).pop();
-                widget.onPermissionsDenied?.call();
-              },
-              child: const Text('Skip'),
-            ),
+          // Always show a cancel/skip button
+          TextButton(
+            onPressed: () {
+              Navigator.of(context).pop();
+              widget.onPermissionsDenied?.call();
+            },
+            child: const Text('Skip'),
+          ),
           if (_errorMessage != null && !_isRequesting)
             ElevatedButton(
               onPressed: () async {