feat: create country item widget

- Displays country flag and name
- Handles flag loading errors
- Placeholder for no flag image
- Shows snackbar on tap

Author: fulleni

lib/headlines-search/widgets/country_item_widget.dart

@@ -0,0 +1,33 @@
+import 'package:flutter/material.dart';
+import 'package:ht_shared/ht_shared.dart'; // Import Country model
+
+/// A simple widget to display a Country search result.
+class CountryItemWidget extends StatelessWidget {
+  const CountryItemWidget({required this.country, super.key});
+
+  final Country country;
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      leading: CircleAvatar(
+        backgroundImage: NetworkImage(country.flagUrl),
+        onBackgroundImageError: (exception, stackTrace) {
+          debugPrint('Error loading country flag: $exception');
+        },
+        child: country.flagUrl.isEmpty 
+            ? const Icon(Icons.public_off_outlined) // Placeholder if no flag
+            : null,
+      ),
+      title: Text(country.name),
+      // TODO(you): Implement onTap navigation if needed for countries
+      onTap: () {
+        // Example: Navigate to a page showing headlines from this country
+        // context.goNamed('someCountryFeedRoute', params: {'isoCode': country.isoCode});
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Tapped on country: ${country.name}')),
+        );
+      },
+    );
+  }
+}