beginning of dust integration page

This is just a start, but I think it might be good to get in to start review/discussion.

Still notably TODO is the docs for `{@formatMessage}`.
Well, that's kinda what I'm saying. NPM links shouldn't necessarily be styled exactly like code. They should be styled as is best for NPM links, which is potentially something completely different from code. I just did a very off-hand/quick styling, I wasn't necessarily suggesting that they should be styled exactly like code, or similar to code, or any relationship with how code is styled.