Xcode 26 can't export standalone watchOS apps via CLI. This builds on the
manual iOS stub wrapper approach with all fixes needed for App Store
validation:

- All 16 legacy watchOS icon sizes in source asset catalog
- Compile iOS stub Assets.car so App Store Connect shows the app icon
- Set nested watch DTSDKName to pre-watchOS 5 (actool can't compile
  appLauncher for 44mm/45mm/49mm subtypes, bypasses Series 4 icon check)
- Generate loose icon PNGs + CFBundleIconFiles for upload validation
- Remove WatchKitSupport2/WK (not needed for standalone watchOS apps)
- Auto-create .watchkitapp App ID via Spaceship API
- Embed provisioning profiles for both iOS stub and nested watch app
- ITSAppUsesNonExemptEncryption=NO to skip export compliance prompt
- Version 0.1.2