next.js

08c74b8b - updated with-polyfills example to utilize the App Router. (#73425)

updated with-polyfills example to utilize the App Router. (#73425) This PR updates the with-linaria 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. - Updated the `package.json` file. CC: @samcx --------- Co-authored-by: Sam Ko <sam@vercel.com>