Fix NBA leaderboard team ID field for logo fetching (#116)

* Fix NBA leaderboard team ID field for logo fetching

- Add missing 'id' field to NBA team standings data structure
- Enables proper logo fetching from assets/sports/nba_logos/
- Fixes 'id' KeyError when creating NBA leaderboard images
- Includes diagnostic and test scripts for verification

* Add NBA logo downloader script and documentation

- download_nba_logos.py: Script to download all 30 NBA team logos from ESPN API
- README_NBA_LOGOS.md: Comprehensive documentation for the logo downloader
- Supports force re-download and quiet modes
- Downloads to assets/sports/nba_logos/ for leaderboard integration

* replace NBA Logos

* return NBA logo

src/leaderboard_manager.py

@@ -373,6 +373,7 @@ class LeaderboardManager:
                 if team_record:
                     standings.append({
                         'name': team_name,
+                        'id': team.get('id'),  # Add team ID for logo fetching
                         'abbreviation': team_abbr,
                         'wins': team_record.get('wins', 0),
                         'losses': team_record.get('losses', 0),