Add autogenerated configuration docs

[ThomasLaPiana]

Is your feature request related to a specific problem?

With the merger of #2613 we'll have all relevant metadata we need within source code to produce exhaustive documentation for our configuration reference.

Describe the solution you'd like

The inclusion of autogenerated configuration documentation included as part of the docs site, which docs.ethyca.com can point to.

Additional context

Configuration docs get out of sync more than anything I would wager, so this is important for usability. Although it might feel weird to pull docs out of the new docs site and into the "legacy" site, it makes sense in this case given that we have no low-friction way to autogenerate docs for the new docs site. Note that we still use the old docs site for hosting the autogenerated API and CLI documentation.