Remove CFB/NASCAR/PGA and streamline to 8 supported sports

- Remove College Football, NASCAR, and PGA from scraper and app
- Clean all data files (stadiums, games, pipeline reports)
- Update Sport.swift enum and all UI components
- Add sportstime.py CLI tool for pipeline management
- Add DATA_SCRAPING.md documentation
- Add WNBA/MLS/NWSL implementation documentation
- Scraper now supports: NBA, MLB, NHL, NFL, WNBA, MLS, NWSL, CBB

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

SportsTime/Core/Theme/ViewModifiers.swift

@@ -215,6 +215,9 @@ extension Sport {
         case .nhl: return Theme.nhlBlue
         case .nfl: return Theme.nflBrown
         case .mls: return Theme.mlsGreen
+        case .wnba: return Theme.wnbaPurple
+        case .nwsl: return Theme.nwslTeal
+        case .cbb: return Theme.cbbMint
         }
     }
 }