Provide directories with a default home page

Currently, the default behavior is to display /browse at root of the website.

We need to change that.

Home page should display:
- Hero section with search field and configurable background
- Grid of the top-level categories with “show cover image” option set to “true” by default
- List of the Collections in form of H2 + Listing Cards + Button “see all”
- List of blog posts (probably grouped by Type, similar to Collections display)
- Grid of the latest items added to the directory with link to the /browse page
- ???