Feature request: mechanism for docs/info about options

[harpocrates]

First off pureconfig is an absolutely fantastic library - thank you so much!

pureconfig makes it refreshingly easy to just state the configuration classes and traits and then derive readers/writers. This works really well as long as the consumers of the applications are themselves developers that don't mind reading the source code of the options. However, for non-Scala (or non-developer) people, it would be super useful if pureconfig could generate some schema information about the config alongside the actual readers/writers.

Has this idea come up before? If there is already some plan or idea, I would be glad to help contribute an implementation.