Update React Native login guide for AppDelegate setup in Swift and Objective-C++ (#10521)

* Update React Native login guide for AppDelegate setup in Swift and Objective-C++

* Update iOS AppDelegate setup instructions for React Native integration

* Fix capitalization and formatting in iOS AppDelegate setup instructions

Author: subhankarmaiti

articles/quickstart/native/react-native/00-login.md

@@ -84,8 +84,16 @@ At runtime, the `applicationId` value will automatically update with your applic
 :::
 
 ### Configure iOS
+#### AppDelegate Setup (Choose Based on Architecture)
 
-In the file `ios/<YOUR PROJECT>/AppDelegate.mm` add the following:
+If you're using (Swift - `ios/<YOUR PROJECT>/AppDelegat.swift`) add the following in `AppDelegate` class:
+
+```swift
+func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
+  return RCTLinkingManager.application(app, open: url, options: options)
+}
+```
+If you're using (Objective-C++ - `ios/<YOUR PROJECT>/AppDelegate.mm`) add the following:
 
 ```objc
 #import <React/RCTLinkingManager.h>