refactor(ads): update NativeAdCardTextOnly to use NativeAdView

- Replace generic NativeAd model with NativeAdView widget
- Simplify widget structure and rendering logic
- Update documentation to reflect new implementation

Author: fulleni

lib/shared/widgets/ads/native_ad_card_text_only.dart

@@ -1,65 +1,29 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_news_app_mobile_client_full_source_code/ads/models/native_ad.dart'
-    as app_native_ad;
+import 'package:flutter_news_app_mobile_client_full_source_code/ads/widgets/native_ad_view.dart';
 import 'package:ui_kit/ui_kit.dart';
 
 /// {@template native_ad_card_text_only}
-/// A generic widget to display a native ad with text only.
+/// A widget to display a native ad with text only,
+/// visually mimicking [HeadlineTileTextOnly].
 ///
-/// This widget is designed to visually match [HeadlineTileTextOnly]
-/// and uses a generic [app_native_ad.NativeAd] model.
+/// This widget accepts a [NativeAdView] to render the actual ad content,
+/// ensuring it remains provider-agnostic.
 /// {@endtemplate}
 class NativeAdCardTextOnly extends StatelessWidget {
   /// {@macro native_ad_card_text_only}
-  const NativeAdCardTextOnly({required this.nativeAd, super.key});
+  const NativeAdCardTextOnly({required this.adView, super.key});
 
-  /// The generic native ad data to display.
-  final app_native_ad.NativeAd nativeAd;
+  /// The widget responsible for rendering the native ad content.
+  final NativeAdView adView;
 
   @override
   Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-    final textTheme = theme.textTheme;
-
-    // Placeholder content for the generic ad.
-    // The actual rendering of the SDK-specific ad will happen in a child widget.
     return Card(
       margin: const EdgeInsets.symmetric(
         horizontal: AppSpacing.paddingMedium,
         vertical: AppSpacing.xs,
       ),
-      child: Padding(
-        padding: const EdgeInsets.all(AppSpacing.md),
-        child: Row(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Expanded(
-              child: Column(
-                crossAxisAlignment: CrossAxisAlignment.start,
-                children: [
-                  Text(
-                    'Ad: ${nativeAd.id}', // Displaying ID for now
-                    style: textTheme.titleMedium?.copyWith(
-                      fontWeight: FontWeight.w500,
-                    ),
-                    maxLines: 3, // Allow more lines for text-only
-                    overflow: TextOverflow.ellipsis,
-                  ),
-                  const SizedBox(height: AppSpacing.sm),
-                  Text(
-                    'This is a generic ad placeholder.',
-                    style: textTheme.bodySmall?.copyWith(
-                      color: theme.colorScheme.primary.withOpacity(0.7),
-                    ),
-                    maxLines: 2,
-                    overflow: TextOverflow.ellipsis,
-                  ),
-                ],
-              ),
-            ),
-          ],
-        ),
-      ),
+      child: adView, // Directly render the provided NativeAdView
     );
   }
 }