add angel framework integration

[insinfo]

It would be interesting if the swagger_ui somehow had integration with angel framework to allow the automatic generation of documentation for a rest API, at the moment I'm using and mitmproxy and mitmproxy2swagger to generate documentation automatically

https://github.com/alufers/mitmproxy2swagger#mitmproxy
https://mitmproxy.org

https://github.com/dukefirehawk/angel