@mdx-js/react fails to install

[TrevorKarjanis]

🧹 Tech Debt

@mdx-js/react is a dependency of @storybook/addon-docs, but it doesn't always get installed. This causes the nimble-components build to fail. #708 declares it as a dependency to resolve the issue. Jesse suggests the issue be investigated further. Storybook issue 18094 may be related.

[rajsite]

This was resolved by #1000 by migrating to mdx2 experimental support in Storybook 6.4.

The "surprsing" explicit dependency on mdx-js/react is still needed but we no longer have runtime errors in storybook about mdx/react support which was the state after the Angular update. And after #1000 we no longer after peer dependency version conflicts due to mdx-js/react when rebuilding the lock file.

After Storybook 7 is released there will be a significant change (mdx2 is the default and builder switches to vite) so any extra clean-up will happen then. I think this issue is fine to close till then.