Web Standards Web Server (native Request / Response support)

[thescientist13]

After working on #1045 and #1048, it's getting to be a little cumbersome not having a web standards based web server that can work directly with Request and Response objects. We have to go back and forth between Koa and web standards, you can see it all over the serve.js lifecycle file.

This was more relevant after #1132 where we weren't able to support all Request properties, as this is all that Koa's ctx.request gives us

CTX.REQUEST {
  method: 'GET',
  url: '/api/missing',
  header: { host: '127.0.0.1:8080', connection: 'close' }
}

Currently Greenwood supports

1. method
2. headers
3. body - (text(), json(), formData()

Additional options to support

1. body - (multi-part forms, Blob, URLSearchParams, etc)
2. mode
3. credentials
4. cache
5. redirect
6. referrer
7. referrerPolicy
8. integrity
9. keepalive
10. signal
11. priority

---

Maybe Hono could be that one, or we roll our own as a separate library? OR, we could probably pretty easily recreate our own implementation of Koa / livereload server, and then we would probably have a better time of implementing #48

[thescientist13]

Also, let's see if it can do #632