Refactor, move from react-scripts to vite

[mihirsamdarshi]

This PR introduces a number of changes.

React no longer maintains create-react-app, and a number of the packages that the frontend were using have long been deprecated

Here are all the changes introduced by this PR:

react-scripts -> vite refactor

• Replaced react-scripts with vite
  • react-scripts has long been deprecated in favor of full-stack frameworks like Gatsby, NextJS, or Remix
  • Vite is the clear replacement, being among the top downloaded non-framework bundlers
  • Vite brought build time of this project down from 120s to 5s on my machine
  • HMR is even faster
  • These changes position us well for future Server-sider rendering (SSR) efforts, especially when combined with the React Router changes below. Transitioning from react-router v6 to Remix with Vite is extremely easy, and immediately provides us SSR capabilities
• Replaced react-scripts package.json scripts with vite commands
• Environment variable changes:
  • Change environment variables from process.env accessor to import.meta
  • REACT_APP_ style environment variables supported by create-react-app to VITE_ style environment variables supported by vite
• Added vite.config.js, using react-swc React compiler plugin.
• Added bundle visualizer in order to see how much space various packages take

react-router v5 to v6 upgrade

• Replaced Redirect component with Navigate component
• Replaced withTracking HOC with a wrapper layout router with the same functionality
• Replaced PrivateRoute with a new AuthWrapper necessitated by direct-rendering changes in v6
• Add lazy loading of routes, to allow for better code-splitting
  • See React's lazy docs to see how code splitting works
  • See the lazy docs on React Router for how lazy loading routes works
  • Note that this requires a <Suspense> element (located in App.js, which currently renders a blank <div> instead of any loading views

Replace jest with vitest

• The removal of react-scripts necessitates the introduction of a test framework
• vitest is a drop-in replacement for jest that works for the vite framework

Misc changes

• Updated storybook to latest
• Updated ESlint to v8

Regressions

• Minor CSS styling issues caused by using react-router's new transparent <Outlet> component for rendering routes. For example, the main MoTrPAC logo is slightly larger than normal, and sometimes clips the header
• CircleCI will continue to fail until the REACT_APP_-styled env vars are replaced by VITE_ style env vars