Publish a recommended config which uses `wc` plugin

Consumers should pretty much always use both eslint-plugin-lit and [eslint-plugin-wc](https://github.com/43081j/eslint-plugin-wc).

To help make this more obvious and easier, we should publish a recommended config which depends on `wc`.

We may want to avoid requiring it as a dependency, though. Maybe some kind of optional peer dependency? if thats possible