We are now no longer shown an option to choose between an existing repo
or creating a new one. We just directly jump into choosing a hosting
provider.
I'm trying to optimize the git host setup for the happy path.
In the case of OAuth errors which we get through the message
channel, throwing an exception doesn't help us as the init function
will not be aware about it.
So for now, I've moved the nodejs style error handling in this
particular case.
For now I've mostly tried to follow the same style guide as the flutter
repository, with many options disabled. Eventually, maybe it would make
sense to be far stricter.
