Spawning off of the discussions in#125, logging it separately for visibility

Would be good if we can setup an interactive playground likehttps://mysticatea.github.io/vue-eslint-demo/

Similarly it would be good if we can add interactive examples to our docs like eslint-plugin-es:https://mysticatea.github.io/eslint-plugin-es/rules/no-json-superset.html

Both of these would of course require us to generate and deploy some form of a website.

The former would definitely be helpful in having users give us concrete REPLs for their bugs, and the latter is nicer than having to manually annotate static markdown codeblocks.