[Feature Request] Add Challenges section to main page

[abdullah50053]

Overview

The challenges section is a section describing the various challenges or tracks that will be held during the hackathon along with the company or organization hosting the challenges.

Proposal

The Challenges section should have buttons on the left with the name of the challenges. Upon pressing the buttons, there should open a card with a description of the challenge and prizes, if applicable.

Supplemental Information

This section should exist on the main page under the Explore section and look like the prototype:

[abdullah50053]

Re #59