Feature: Theme change and process improvements

[jeremyckahn]

Hello! This PR does several things:

1. It changes the theme to Minami, which I feel helps to better present the content than the default JSDoc theme: https://jeremyckahn.github.io/javascript-algorithms/
2. It improves the documentation generation process. Now, instead of managing two separate sibling local repos, you can just do npm run doc:build.
3. It provides a simpler process to view the generated docs locally with a call to npm run doc:view.
4. It provides a one-step documentation deployment process via npm run deploy.

I hope you find these changes useful. Thanks for making such a great resource!