More helpful, crawlable base for /api endpoint

[themeblvd]

Currently, the public API produced from the CMS isn't all that helpful if you don't know the exact routes for your GET requests.

I would eventually like to see things be more helpful. For example, if I hit /api it should tell me all available routes from there, which would currently be /v1.

And if I hit a GET request to /api/v1/ instead of not returning anything, it could tell me all of the available routes from there, which would be for content type routes, users, etc.

I imagine SEO folks would say this is better for Google indexing, as well.