tr/deploy spike

[isTravis]

This PR makes some broad changes towards setting the groundwork for non-demo development. I believe none of it should conflict with any of the API work ongoing.

• Replace Chakra with Tailwind and custom components. See STYLES.md for reasoning behind this decision.
  • I didn't exactly reproduce the layout and styling as it was before (it's noticeably worse now) because there is deeper work to be done to build a more functional UI that used Tailwind's configuration options and capabilities. So, since we're going to re-write these components shortly anyways, I decided to not spend too much time re-implementing the previous style exactly.
• Update the seed file to create all seed communities at the same time (rather than switching between seed files). This, in combination with a functioning CommunitySwitcher component, allows us to switch between the demo communities, rather than re-running a new seed file each time.
• Use community slugs for routing given the above update (also, update queries to use this slug for filtering pub/stage/etc results).
• Add yorkie so that the gitHooks defined in our package.json actually run. Implements prettier on commit, and a type check before pushing. See README.md for details on how to opt out of the latter if needed.