chore: remove scraper, add docs, add marketing-videos gitignore

- Remove Scripts/ directory (scraper no longer needed)
- Add themed background documentation to CLAUDE.md
- Add .gitignore for marketing-videos to prevent node_modules tracking

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

SportsTime/Core/Theme/AnimatedBackground.swift

@@ -122,7 +122,6 @@ struct AnimatedSportsIcon: View {
         (0.9, 0.85, "mappin.circle.fill", -8, 0.75),
         (0.5, 0.03, "car.fill", 0, 0.7),
         (0.5, 0.97, "map.fill", 3, 0.75),
-        (0.25, 0.93, "stadium.fill", -5, 0.7),
         (0.75, 0.95, "flag.checkered", 7, 0.7),
         // Middle area icons (will appear behind cards)
         (0.35, 0.22, "tennisball.fill", -8, 0.65),