setup Prettier + create GitHub Action that lints with Prettier?

[HonkingGoose]

Do we want to setup a Prettier configuration + CI that checks for Prettier errors on this repo?
I use Prettier to good effect on my simple Docusaurus v2 repo, but it might get complicated due to some autogenerating content.

Somebody who knows how the build process works should set up the prettierignore file so that we're only prettifying things we care about.

[viceice]

Sure, let's do this when we switch to docusaurus. I'll try to make progress on next week's

[viceice]

Lets add husky and lint-staged for pre-commit validation