[WIP] Cookbook Directory UI Updates

:construction_worker: 

This is a work in progress with the goal of updating the Cookbooks directory and content.

The Trello card: https://trello.com/c/BEl1jGlB

The mock-up for the search results live here: https://projects.invisionapp.com/share/DGP7AUT4#/screens/19735740?maintainScrollPosition=false

I am currently working on making the changes and adding in the content. The more resource heavy content will probably not be part of this pull request.