[Feature Request] ignore *.config.js in widget directory

[twio142]

So eslint.config.js and babel.config.js can be used.

[twio142]

Also, I think it'd be good practice to use a user.config.js for the users to make custom settings for a widget, and then import this in index.js. This avoids hardcoding the values into index.js, making it consistent for version control.