Consider making the Leopard website static

[adroitwhiz]

Right now, the Leopard website is deployed using a Vercel free plan, meaning it can't live in this organization.

However, the site doesn't appear to require much in the way of a backend. The only persistent state we're using is a list of converted projects, which I'd like to get rid of anyway due to privacy concerns.

Since sb-edit runs in the browser, it would be possible to convert projects client-side, which might also be faster. I'm not sure if CodeSandbox's API can be used entirely client-side, which might be an issue.