Issue #3543414: Setup skeleton for JavaScript application
Closes #3543414
Testing Instructions
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Checkout this branch -
Run npm ciandnpm run build -
Go to an Experience Builder page and verify that when you click the button you get a JavaScript app saying "Hello, world!"
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Run npm run dev -w appand verify that you can go to the URL given and see a standalone development version of the above application
Edited by Sally Young

