docs: next.js page router example

[DNR500]

Jira: LF-9051

The added example here is intended to help share how to get the Widget working with Page Router pages and uses Next.js dynamic loading mechanicsm.

import dynamic from 'next/dynamic';

const DynamicWidget = dynamic(() => import('@/components/Widget'), {
  loading: () => <p>Loading...</p>,
  ssr: false,
});  

export default function Home() {
  return (
      <main>
        <DynamicWidget />
      </main>
  );
}

[chybisov]

Can we use our Skeleton here?

[DNR500]

We need to do a bit of work to allow that. Looking at it now