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>

Scripts/validate_canonical.py

@@ -67,6 +67,32 @@ EXPECTED_GAMES = {
         'max': 168,
         'description': 'MLB regular season (162 games)'
     },
+    'nfl': {
+        'expected': 17,
+        'min': 15,
+        'max': 20,
+        'description': 'NFL regular season (17 games)'
+    },
+    'wnba': {
+        'expected': 40,
+        'min': 35,
+        'max': 45,
+        'description': 'WNBA regular season (40 games)'
+    },
+    'mls': {
+        'expected': 34,
+        'min': 30,
+        'max': 40,
+        'description': 'MLS regular season (34 games)'
+    },
+    'nwsl': {
+        'expected': 26,
+        'min': 22,
+        'max': 30,
+        'description': 'NWSL regular season (26 games)'
+    },
+    # Note: CBB doesn't have fixed game counts per "team"
+    # CBB teams vary widely (30+ games)
 }