[Typography foundations] [Migration] Badge

[sarahill]

Figma file
Both medium and small variants will now use body-sm

[laurkim]

@sarahill since the size prop only resized font-size, we should remove size as a prop on Badge in the existing branch for our next major release, since it's a breaking change. I was going to do it in the existing type migration PR, but I don't know the timeline for the release and don't want to block the text migrations PR.

Commit with update.