Customizing the watch target

Icons, display name, Info.plist entries, capabilities, deployment target — anything about the watch target itself is governed by expo-target.config.{json,js} from @bacons/apple-targets.

@appsent-co/react-native-watchos only owns the runtime side: rendering, JS execution, Watch Connectivity, autolinking, and bundle delivery.

TODO: document the runtime-side knobs exposed by the config plugin (e.g. watchOS deployment target override).