after itr 3
Add more challenges after itr 3
Update Guides of App
Add Combo meal guides & Add cost calculator after itr3
Update input ingredients page & update recipe manager
Updated Home (markdown)
Updated Architecture (markdown)
Updated API Documentation (markdown)
Updated FAQ (markdown)
Destroyed _Footer (markdown)
Created _Footer (markdown)
Updated Challenges (markdown)
Destroyed Backend (markdown)
Destroyed Frontend (src) (markdown)