This copies the rules from the Browsertrix repo, and uses
[`suppress-eslint-errors`](https://www.npmjs.com/package/suppress-eslint-errors)
to suppose the violations. I'll take a pass at cleaning this up at some
point in the future, and let's do our best to address these in the
future as we come across them :)
This'll help ensure new code being added to this repo is held to the
same standard as code in Browsertrix's frontend.
Emma Segal-Grossman