refactor: configure prettier and eslint, run --write against src files

[tomjeatt]

This PR adds prettier, and removes conflicting es-lint rules, e.g. the ones which related to formatting. I've also autofixed everything (which is why the PR is so huge!).

This follows the standard convention of prettier for formatting and eslint for code quality (I've left all of those eslint rules as they were).

There was already a prettier config in the project so I've used that. Other than that I don't want to move away from the defaults; Prettier is opinionated and that's what makes it easier to use, especially as the dev team grows.

We may want to add additional plugins (e.g. sort order) but they can be done as smaller tasks. Priority is to get the basics in now so we can get our PRs done faster.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
interbtc-ui-interlay	✅ Ready (Inspect)	Visit Preview	May 26, 2022 at 3:32PM (UTC)
interbtc-ui-kintsugi	✅ Ready (Inspect)	Visit Preview	May 26, 2022 at 3:32PM (UTC)
interbtc-ui-testnet	✅ Ready (Inspect)	Visit Preview	May 26, 2022 at 3:32PM (UTC)

[crypto-engineer]

LGTM

[crypto-engineer]

@tomjeatt
One thing. The other day, I suggested integrating eslint-plugin-simple-import-sort. In my experience, it's worth having it since it helps maintain import order in a consistent way.
Actually, the other day, I discussed with @peterslany about this issue.

[tomjeatt]

@tomjeatt One thing. The other day, I suggested integrating eslint-plugin-simple-import-sort. In my experience, it's worth having it since it helps maintain import order in a consistent way. Actually, the other day, I discussed with @peterslany about this issue.

Hi Anton, yes totally agree (it's mentioned in the PR description) but want to get this one wrapped up today as it's been in the backlog for a while - adding the sort order plugin and then running fix should be very straightforward.