Docs: Show MDX errors using our error overlay

[tmeasday]

Closes #20841

What I did

Made it so docs actually renders errors using our typically rendering stack if the MDX file has a issue

How to test

You can visit this entry, or make your own: http://localhost:6006/?path=/docs/addons-docs-docs2-error--docs

Checklist

• Make sure your changes are tested (stories and/or unit, integration, or end-to-end tests)
• Make sure to add/update documentation regarding your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Maintainers

• If this PR should be tested against many or all sandboxes,
  make sure to add the ci:merged or ci:daily GH label to it.
• Make sure this PR contains one of the labels below.

["cleanup", "BREAKING CHANGE", "feature request", "bug", "documentation", "maintenance", "dependencies", "other"]

[shilman]

LGTM. Does this affect crash reporting at all?

[tmeasday]

I don't think so @shilman -- this is a runtime error.