References - add example tabs for client libraries / other programming languages

[mDuo13]

It would be great for the API reference pages (for example, account_info) to have example requests and responses (where it makes sense) for major/supported client libraries and programming languages. Right now the pages have tabs for WebSocket, JSON-RPC, and Commandline formats, which is fair since the point of these pages is to document the HTTP/WebSocket APIs, but it would also be handy to have example requests that devs could copy-paste and modify as needed if they're using xrpl.js, xrpl-py, etc.

Probably a lot of this work could be automated to some degree if things are in a standard format.