Remove error classes and use http-errors.

[jaydenseric]

• Remove the previously exported error classes to use http-errors instead.
• Error details are now snapshot tested.

Most errors were a pretty obvious conversion, but I do wonder about the errors for when the client unexpectedly disconnects. I chose the status code 499, which is a non-standard code used by nginx for Client Closed Request which seems like a perfect fit: https://httpstatuses.com/499. http-errors does not have a special class for this code though, so it falls back to a BadRequestError class name.

[jaydenseric]

@mike-marcacci YOLO I'm merging it, still let me know your thoughts though :)

[mike-marcacci]

499 is the perfect code to use here, is it will mirror the logs in any nginx proxies, etc.