This diff handles unauthing from farcaster. We handle unauthing from farcaster by removing the set fid from the farcaster provider. There is a task to handle updating this to replace all FIDProvider usages with synced metadata store tracked here: https://linear.app/comm/issue/ENG-7590/replace-all-fidprovider-usages-with-synced-metadata-store

cc @will

Depends on D11512

Confirmed that the fid is getting unset when onPressDisconnect is getting called