feat: add likes command

Add `bird likes` command to fetch the authenticated user's liked tweets,
similar to the existing bookmarks command.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

src/index.ts

@@ -150,6 +150,7 @@ const KNOWN_COMMANDS = new Set([
   'search',
   'mentions',
   'bookmarks',
+  'likes',
   'help',
   'whoami',
   'check',
@@ -347,6 +348,7 @@ program
       'SearchTimeline',
       'UserArticlesTweets',
       'Bookmarks',
+      'Likes',
     ];
 
     if (cmdOpts.fresh) {
@@ -741,6 +743,39 @@ program
     }
   });
 
+// Likes command - get user's liked tweets
+program
+  .command('likes')
+  .description('Get your liked tweets')
+  .option('-n, --count <number>', 'Number of likes to fetch', '20')
+  .option('--json', 'Output as JSON')
+  .action(async (cmdOpts: { count?: string; json?: boolean }) => {
+    const opts = program.opts();
+    const timeoutMs = resolveTimeoutFromOptions(opts);
+    const count = Number.parseInt(cmdOpts.count || '20', 10);
+
+    const { cookies, warnings } = await resolveCredentialsFromOptions(opts);
+
+    for (const warning of warnings) {
+      console.error(`${p('warn')}${warning}`);
+    }
+
+    if (!cookies.authToken || !cookies.ct0) {
+      console.error(`${p('err')}Missing required credentials`);
+      process.exit(1);
+    }
+
+    const client = new TwitterClient({ cookies, timeoutMs });
+    const result = await client.getLikes(count);
+
+    if (result.success && result.tweets) {
+      printTweets(result.tweets, { json: cmdOpts.json, emptyMessage: 'No liked tweets found.' });
+    } else {
+      console.error(`${p('err')}Failed to fetch likes: ${result.error}`);
+      process.exit(1);
+    }
+  });
+
 // Whoami command - show the logged-in account
 program
   .command('whoami')