[native] improve error handling for TagUnfollowedFarcasterChannel screen
Summary:
This diff improves the error handling for TagUnfollowedFarcasterChannel by providing a few error messages to the user based on the error.message that was given
Depends on D11866
Test Plan:
Please see the screenshots below
Reviewers: inka, ashoat
Reviewed By: inka
Subscribers: ashoat, tomek
Differential Revision: https://phab.comm.dev/D11893