next.js

79778984 - updated with-react-foundation example to utilize the App router. (#73243)

updated with-react-foundation example to utilize the App router. (#73243) This PR updates the with-react-foundation example for using the App Router. Here are the changes that have been made: - I renamed the `pages` folder and moved it to the `app` folder. - Added the layout.tsx file as part of the App Router. - Moved component folder into app folder. - Updated the package.json file. CC: @samcx --------- Co-authored-by: samcx <sam@vercel.com>