Setup SanityCMS studio + basic schema

[pawan-live]

Create a sanity.io CMS account for the codefest website, and create basic schema to hold competition data.

• competitions
  • name
  • start_date
  • prize
  • cover_image
  • description
  • deadline
  • timeline_events
    • registration
      • start_date
      • end_date
    • submission_round
      • start_date
      • end_date

etc, like this. Have to plan out what is needed exactly on the FE