[longer term] Increase priority of serving the index as static files over HTTP

[carols10cents]

Could the foundation assist in funding this? Could this come out of the crates.io maintenance budget?

• RFC: Serve crates-io registry over HTTP as static files rfcs#2789
• Tracking Issue for serving an index over HTTP cargo#9069
• Implement experimental registry HTTP API from RFC cargo#8890

[0xPoe]

@carols10cents I guess we can close this issue now.

[carols10cents]

🎉 Great find!