Add documentation for config changes

[voxpelli]

Ideally I would like neostandard to adapt a documentation approach similar to the one I have been doing in my personal superset (see screenshot)

I was working on automating that before flat configs came around and changed the config format. I do would like to extend https://github.com/voxpelli/compare-eslint-configs to support that though (and maybe split it / rename it to a then less confusing name)

There exists eg. bmish/eslint-doc-generator for plugins to generate documentation for rules, but there is no similar one for configs, and I think that would be really helpful, especially when possibly evaluating existing configs in a future.

[voxpelli]

Could possibly use: https://github.com/eslint/config-inspector Especially if extended