implement a symptom checker and add links to the helpful links section

Created by: sainak

Is your feature request related to a problem? Please describe. add a symptom checker so that the users can check if the require examination

Describe the solution you'd like implement a symtom checker than can evaluate the result based on the answers of the users example: https://covid.bhaarat.ai/ https://www.apple.com/covid19/

Describe alternatives you've considered for now add the links to these websites in the helpful links

Additional context