Is your feature request related to a problem? Please describe.
Currently there is no way to include an Apple Watch App in your NativeScript application.

Describe the solution you'd like
I'd like to add the watch app and watch app extension code inside App_Resources/iOS and the tooling to integrate them build time inside the iOS app.

Describe alternatives you've considered
No alternatives.

Additional context
None.

Workflow:

1. Create Single Page App from Xcode.
2. Add watch app target - File>New>Target>WatchKit App
3. Add a name to your watch app, for example MyFirstWatchApp
4. Copy the generated "MyFirstWatchApp" and MyFirstWatchApp Extension to .../apps/MyApp/app/App_Resources/iOS/watchapp/MyFirstWatchApp and .../apps/MyApp/app/App_Resources/iOS/watchextension/MyFirstWatchApp Extension respectively.
5. Inside the Info.plist of the Watch App replace the value of WKCompanionAppBundleIdentifier with $(WK_APP_BUNDLE_IDENTIFIER).
   6 Inside the Info.plist of the Watch Extension replace the value of WKAppBundleIdentifier with $(WK_APP_BUNDLE_IDENTIFIER).
6. You can populate the Assets.xcassets of the Watch App and the Watch Extension and add the name of the appiconset to the .../apps/MyApp/app/App_Resources/iOS/watchapp/MyFirstWatchApp/watchapp.json and .../apps/MyApp/app/App_Resources/iOS/watchextension/MyFirstWatchApp Extension/extension.json respectively:

{
    "assetcatalogCompilerAppiconName": "AppIcon"
}

8. You can modify the WATCHOS_DEPLOYMENT_TARGET of the Watch App by adding the value inside the watchapp.json like this:

{
    "assetcatalogCompilerAppiconName": "AppIcon",
    "targetBuildConfigurationProperties": {
        "WATCHOS_DEPLOYMENT_TARGET": 4.1
    }
}

9. Run the NativeScript application