next.js

21fa7730 - docs(mdx): add a dynamic imports section for App Router (#73466)

docs(mdx): add a dynamic imports section for App Router (#73466) ## Why? Adding a section dedicated to dynamically importing MDX files inside pages for App Router. - x-ref: https://github.com/vercel/next.js/discussions/70417 --------- Co-authored-by: Lee Robinson <me@leerob.io>