feat: add news command to fetch AI-curated headlines

Add comprehensive news/trending feature that fetches AI-generated news
headlines from Twitter's "For You" page. This feature specifically
targets the AI-curated news items that Twitter displays under "Today's
News" section, not generic trending hashtags.

- Uses Twitter's ExplorePage GraphQL API endpoint to access the Explore
  page timeline data where AI headlines are located
- AI headlines are identified by the explicit `is_ai_trend: true` flag
  in the API response
- Fallback heuristic detection for full-sentence headlines (5+ words)
  with "News" or time indicators in social context
- Headlines are found in "stories-*" modules within the initialTimeline
  structure under a "Today's News" header
- Follows the existing mixin pattern (withNews) for composability
- Supports both AI-only filtering and mixed trending/AI results

- `bird news` - Fetch news and trending topics (mixed results)
- `bird news --ai-only` - Fetch ONLY AI-curated headlines
- `bird news -n <count>` - Limit number of results
- `bird news --json` - Output as JSON
- `bird news --json-full` - Include raw API response
- `bird news --with-tweets` - Enrich with related tweets
- `bird trending` - Alias for news command
- AI headlines are clearly marked with "AI · " category prefix
- Automatic deduplication of duplicate headlines
- Rich formatting with category, time, post count, and URLs

- src/commands/news.ts - CLI command implementation
- src/lib/twitter-client-news.ts - Core news fetching functionality
- tests/commands.news.test.ts - Command validation tests (7 tests)
- tests/twitter-client-coverage.news.test.ts - API coverage tests (7 tests)

- README.md - Added documentation for news command
- src/cli/program.ts - Registered news command
- src/lib/index.ts - Exported news-related types
- src/lib/twitter-client.ts - Integrated withNews mixin
- src/lib/query-ids.json - Added ExplorePage query ID
- src/lib/twitter-client-constants.ts - Added ExplorePage constant
- src/lib/twitter-client-features.ts - Added buildExploreFeatures()
- scripts/update-query-ids.ts - Added ExplorePage to update script

- All 268 existing tests continue to pass
- Added 14 new tests covering command validation and API functionality
- Tested with real Twitter data confirming AI headline detection
- All TypeScript compilation and linting checks pass

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

scripts/update-query-ids.ts

@@ -19,6 +19,9 @@ const TARGET_OPERATIONS = [
   'Following',
   'Followers',
   'Likes',
+  'ExploreSidebar',
+  'ExplorePage',
+  'TrendHistory',
 ] as const;
 
 type OperationName = (typeof TARGET_OPERATIONS)[number];