Add favicons

[shubham1172]

To-do

To adhere to the best practices, we must add a manifest.json and favicon icons for our application.
https://developers.google.com/web/fundamentals/web-app-manifest

Files to play with:

• ./public/favicons/manifest.json
• ./public/favicons/favicon-32x32.png
• ./public/favicons/favicon-16x16.png
• ./public/favicons/favicon-96x96.png
• ./public/favicons/android-icon-192x192.png

[shubham1172]

@kunal768, assign someone on this.

[kunal768]

@sarrthak please do this