Add resource carousels to the new open front page

[abeglova]

We would like to add carousels for
Upcoming courses (with a menu for filtering for selecting All, Certificate, Micromasters or Professional ed)
Popular Learning Resources
New Videos from MIT
Upcoming Professional Education Course (in a separate, highlighted box)

The design is here:
https://www.figma.com/file/zyQTnhYbid1DT5ZaS7MCu6/MIT-Open?node-id=582-1535&t=dnW66AbrLKASsvQd-0

[abeglova]

Since I've been working on this for a while I will put just the desktop UI up in the initial PR with a followup to fix the mobile view.