- Rename yosemite_sights.md -> parks_sights.md, broaden to cover both
Yosemite and Sequoia/Kings Canyon
- Add sf_sights.md, la_sights.md, vegas_sights.md candidate menus
- Link all sights menus from README and itinerary
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
