This PR updates the with-eslint example for using the App Router.
Here are the changes that have been made:
- Renamed the "pages" folder to the "app" folder.
- Added the layout.tsx file as part of the App Router.
- Updated the package.json file.
- Updated tsconfig.json file
CC: @samcx
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Co-authored-by: samcx <sam@vercel.com>