Document location simulation workflows

[AvdLee]

Summary

• Expand the Location Simulation docs into a complete guide for side-window controls, saved App Action locations, car/walking routes, custom coordinates, route tuning, timezone relaunch, and team sharing.
• Add the fresh screenshots for the documented location workflows without recompression.
• Cross-link the guide from the docs hub, App Actions setup, privacy permissions, quick actions, and the homepage feature metadata.

Test plan

• npm run lint
• npm run format:check
• npm run typecheck
• npm run build
• npm run knip