chore: specify RN peer dep version when installing Amplify UI RN package

[tiffanynwyeung]

Description of changes:

The @aws-amplify/ui-react-native package requires a specific peer dependency version of react-native-safe-area-context@^4.2.5. This is mentioned in the UI library docs but not in here as well. Failure to pin the dependency version results in a dependency resolution error as it attempts to install a newer version of the package that conflicts with the UI React Native package.

Related GitHub issue #, if available:

Instructions

If this PR should not be merged upon approval for any reason, please submit as a DRAFT

Which product(s) are affected by this PR (if applicable)?

• amplify-cli
• amplify-ui
• amplify-studio
• amplify-hosting
• amplify-libraries

Which platform(s) are affected by this PR (if applicable)?

• JS
• Swift
• Android
• Flutter
• React Native

Please add the product(s)/platform(s) affected to the PR title

Checks

• Does this PR conform to the styleguide?

• Does this PR include filetypes other than markdown or images? Please add or update unit tests accordingly.

• Are any files being deleted with this PR? If so, have the needed redirects been created?

• Are all links in MDX files using the MDX link syntax rather than HTML link syntax?
  
  ref: MDX: [link](https://docs.amplify.aws/)
  HTML: <a href="https://docs.amplify.aws/">link</a>

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[tiffanynwyeung]

Please note that SafeAreaView is removed here because the Authenticator UI component has safe area handling included in its implementation, making this call unnecessary.

(Specifically, the component uses SafeAreaProvider and the useSafeAreaInsets hook as recommended by the React Navigation team.)

[jordanvn]

This looks good to me. This pinned dep version is already specified as such in the UI library docs for RN.