Add API Explorer feature

[xentek]

Provide some sort of API Explorer functionality so that you can easily play with your API in the browser.

[ismasan]

Hi. Really interesting project. I've been playing around with similar ideas.

Regarding an API explorer, maybe if Hyperdrive would render a known schema (HAL, Siren, etc) or maybe JSONSchema / Swagger then you could use any number of existing GUIs to explore the API?

I've got other questions about nested payloads and schemas but I'm not sure this is the right place for them.

Regards