Add ESLint and Some Sort Of Code Linting CI Check

[alexfinnarn]

Need to have code format checking and have it run on every PR.

[alexfinnarn]

The main weirdness here is with the Link component and Next.js. It makes you use an inaccessible <a> tag, but when rendered, the link is complaint with accessibility standards.

jsx-eslint/eslint-plugin-jsx-a11y#402 (comment)

A follow up issue would have to be made to correct that, but I won't add linting during CI checks until I've added all components and pages from the MVP app.