Prettier Configuration #234

I've got prettier set up to lint my .webc files in my own project using this configuration

.prettierrc.json

{
  "overrides": [
    {
      "files": "*.webc",
      "options": {
        "parser": "html"
      }
    }
  ]
}

We could make this easier for folks to get set up with, maybe in one of these ways:

1. Contribute this to the Prettier project as a default setting?
2. Automatically add this to prettier config for new projects?
3. Add instructions to the documentation website for webc with this as a setup tip?