Proposal to change the iOS general setup document

[SungHyun22]

The documentation says to put the following code(IOS general setup) in didFinishLaunchingWithOptions method

if #available(iOS 10.0, *) {
  UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
}

But in reality, that code is in the application method.

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as UNUserNotificationCenterDelegate
    }

    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

I think this may confuse the readers of the document. How about explicitly mentioning where to put the iOS general setup code in the documentation?

this part.

By the way, thanks for the good library 😁😁

[MaikuB]

Thanks for picking up on that. Could you please submit a PR?

[SungHyun22]

Okay!!

[MaikuB]

Forgot to close this since PR had been merged. Thanks again for the submission