[codex] Add native iOS web parity app

[NitBuk]

Summary

• Add a native SwiftUI iPhone app under apps/ios_go_now as the new primary product surface.
• Match the web forecast experience with Today, Planner, Profile, day metric charts, day/hour detail flows, Status, Formula, and About screens.
• Document the shared /v1/public/scores contract so web and iOS stay aligned on backend-owned scoring.

Details

• Uses /v1/public/scores?area_id=tel_aviv_coast&days=7 for forecast/scoring data.
• Adds /v1/public/health client/model support for the native Status screen.
• Adds native metric extraction and charts for Score, Temperature, UV, Wind, Waves, Rain, and AQI.
• Keeps web app unchanged except documentation/readme updates clarifying shared API usage and iOS ownership.

Verification

• build_sim succeeded
• test_sim succeeded: 13 passed, 0 failed
• build_run_sim succeeded on iPhone 17 simulator
• Manual simulator checks:
  • Today loads live forecast
  • 7-day row opens day detail
  • metric picker updates chart/rows
  • Planner chart affordance opens day detail
  • Profile opens Status, Formula, About

Closes #33 for the first native web-parity milestone. Auth, profiles, notifications, and on-device scoring remain follow-up V2 scope.