Initial commit: Flights iOS app

Flight search app built on FlightConnections.com API data.
Features: airport search with autocomplete, browse by country/state/map,
flight schedules by route and date, multi-airline support with per-airline
schedule loading. Includes 4,561-airport GPS database for map browsing.
Adaptive light/dark mode UI inspired by Flighty.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

design/icon-options/README.md

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+Generated app icon concepts for `Flights`.
+
+Files:
+- `01_orbital-route.png`: dark, route-led, strongest "fly everywhere" story.
+- `02_window-badge.png`: bright and premium, centered globe with orbital motion.
+- `03_atlas-tile.png`: editorial/lightweight, dark inset tile on an airy base.
+- `04_night-ring.png`: bold and futuristic, orbit-ring treatment on a dark field.
+- `05_route-card.png`: clean iOS card language using the app's UI motif.
+- `comparison-sheet.png`: all five options on one board.
+
+Regenerate:
+```sh
+swift -module-cache-path /tmp/swift-module-cache design/generate_icon_options.swift
+```