Add section for case studies

[ashwin-sureshkumar]

It would be nice to have a list of case studies for pwa by different organizations. Currently these case studies are not easily discoverable.

[ebidel]

@ashwin-sureshkumar have you seen https://developers.google.com/web/showcase/tags/progressive-web-apps? There are a ton of PWA cases studies there. Admittedly. also not very discoverable :(

[ashwin-sureshkumar]

That's amazing, I have gotten to something similar through a different path need to find that out.

Seeing these kind of case studies motivates other organizations/developers to build pwas and also provides the necessary metrics of benefits and conversions.

[ashwin-sureshkumar]

@ebidel do you think this application could be the one to make it discoverable, if not it would be nice if there is a way to request developers.google.com to make it easily discoverable.