[chainctl] Improve chainctl docs organization, add some general guidance docs

[SharpRake]

Is your feature request related to a problem? Please describe.
Our chainctl docs are a bit of a confusing mess these days. Per a quote Kim shared:

"I don't see anything (for schema or docs on the config). I gotta be honest I do find the docs a little hard to navigate. There are auto generated docs for all the commands but we don't have an overview page for chainctl that I can find"

Describe the solution you'd like
What if we had some overarching chainctl docs? I feel like we could highlight some general usage in a few short tutorials. It might take some finagling to reorganize the autodocs but if it makes chainctl more useful, that would be awesome for us.

Describe alternatives you've considered
I've not considered any alternatives and would be very welcome to any ideas.

Additional context
This issue came from this comment from Kim in another issue.
@jamonation I'm looping you in b/c of the autodocs and because I think you'd be a great thinking partner on this (when you're back from vacation and settled of course)

[SharpRake]

Moving to backlog for now

[ltagliaferri]

This is a nice to have but will be hard to modify this based on current automated workflows. We do have an overview page on chainctl which is linked at the top of the chainctl landing page.