If only we had a page that uses everything, we could...

• Include it in CI as a page we always build (when not doing a build based on the git diff)
• The default page to open when you manually test stuff out.
• When working on the design system, have a page that contains all possible tables, notes, definition lists, bullet-point lists. (Without this, poor @schalkneethling has to memorize a couple of standard pages to check things like "Specification table" or "Deprecation warning")
• We can write a puppeteer script in CI that opens this page and takes a massive screenshot that we then upload as a PR comment.
• We can check out mdn/content in Yari's CI and build specifically this page.