feat: implement a basic website

[superhawk610]

This PR adds a React application under the web directory. Below I've included the TODO and Usage notes from the readme included with the new application.

TODO

• webpack config
• logo design
• theme design (colors + layout)
• network interface
  • backend implementation (replace ../registry/handlers/www.js)
  • frontend implementation (xhr sending/receiving)
• splash page
• package search page
• package detail page

Usage

This repository is setup as a standard React application - each route renders a page from the pages directory, which in turn contains some number of components from the components directory. This project leverages the following technologies:

• webpack for bundling
• @reach/router for client-side routing
• typescript for static typing
• react for component design
• styled-components for, well, component styling
• jest via ts-jest for testing

Screenshots

[superhawk610]

Closing this as we'll likely be going with a slightly different approach (via #107).