iOS: Enable/Allow faceId touchid or any biometric action before redirect or close the modal/webview

## Issue
Hi everyone.

I was wondering if it would be possible, after entering valid credentials and getting the token, to give the user some time in iOS to be able to save the credentials before closing the webview/modal.

If not, could someone point me in the right direction to try to do it myself in any of the library files?
I was trying to do it with the following files, but I couldn't find the right spot to, for instance add some kind of timeout so the user is able to tap in "save credentials" after the credentials are validated and before the modal is closed.

node_modules/react-native-app-auth/ios/RNAppAuth.m
ios/Pods/AppAuth/Sources/AppAuthCore/OIDAuthorizationService.m
ios/Pods/AppAuth/Sources/AppAuthCore/OIDAuthState.m
ios/Pods/AppAuth/Sources/AppAuthCore/OIDAuthorizationRequest.m

Thanks in advance!

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## Environment

Azure
iOS
`react-native` Version**: `0.73.6`
`react-native-app-auth` Version: `^7.1.0`
* **Are you using Expo?** NO

まず RNAppAuth.m の iOS 認証および終了フローを追跡し、次に OIDAuthorizationService.m、OIDAuthState.m、OIDAuthorizationRequest.m を調査します。トークンを受け取る場所と、モーダルまたは webview を閉じる場所を特定します。iOS フローがリダイレクトまたは終了の前に、要求された生体認証または認証情報の保存操作を実行できれば完了です。

索引モデルが issue の本文から書いたものです。