Create Codeheat 2021 webpage

[Ubayed-Bin-Sufian]

This ticket lists the updates, issues, screenshots or screencasts related to Codeheat 2021 webpage. All the above will be documented in this ticket.

Reference: https://github.com/fossasia/2021.codeheat.org, https://2021.codeheat.org/

This page inherits the homepage styles in the reference.

TASK:

• Add Hero, Stats, Sponsors, Areeb Jamal, Codeheat Issues, Projects, About, Timeline & FAQ section
• Add Jury section
• Add Mentors
• Screencast of sliding animations for the above sections