Summary:
This change adds the necessary scaffolding to enable deep-link for PWA.
1. Registers the protocol/scheme in the manifest.json
2. Add a skeleton handler that parses the received arguments
Notes for reviewers:
PWA cannot reuse the 'flipper://' scheme as is not allowed. PWA schemes are limited. The only extension point is 'web+...' which is the one that is used.
Reviewed By: antonk52
Differential Revision: D48562301
fbshipit-source-id: e191fcb1a6604d20a55c1acdadf6a8eb0194895b