feat: improve text output with article preview, quote tweets, and media

Enhance the text output format to show more useful information:

- Article tweets: Show 📰 indicator with title + preview text in feeds,
  full body when reading single tweets
- Quote tweets: Display quoted content with ┌─ QT @user formatting
- Media: Show 🖼️/🎬/🔄 indicators with URLs for photos/videos/GIFs

Also refactors single tweet read to use shared printTweets function
for consistent formatting.

src/lib/twitter-client-types.ts

@@ -236,6 +236,11 @@ export interface TweetData {
   quotedTweet?: TweetData;
   // Media attachments (photos, videos, GIFs)
   media?: TweetMedia[];
+  // Article metadata (for Twitter Articles / long-form posts)
+  article?: {
+    title: string;
+    previewText?: string;
+  };
   // Raw GraphQL tweet result (only when includeRaw is enabled)
   _raw?: GraphqlTweetResult;
 }