Updated basic-export example with app router (#67760)
This PR updates the basic-export example to use the App Router. Here are
the changes that have been made:
Renamed the "pages" folder to "app" folder.
Updated the routing for / and /about, files to align with the App
Router.
Added the layout.tsx file as part of the App Router.
cc : @samcx
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Co-authored-by: ShruthiKathula <147117812+ShruthiKathula@users.noreply.github.com>
Co-authored-by: samcx <sam@vercel.com>
