[native] add the connect farcaster step into the registration flow

Summary:
This diff adds the ConnectFarcaster screen into the registration flow. We want to show the connect farcaster screen after the connect etherum screen.

In this diff we also need to add an optional fid field to Params of all the screens after connect farcaster + RegistrationServerCallInput in order to potentially pass an fid through the registration flow

Depends on D11442

Test Plan:
Please see the demo video below + tested the entire sign in flow during the hackathon

Reviewers: atul

Reviewed By: atul

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D11461