Add monorepo example to docs?

[maybebansky]

I know it's not specific to this project but I'd love to see a monorepo example in the docs. My preference would be PNPM.

I know there's a NextJS example but if you want to use extension components in multiple pages then a monorepo feels like a better way to go.

[AaronConlon]

Monorepo? We want nx! LOL