Save and restore a wizard flow

[soywod]

I have a tool called Himalaya, a CLI to manage emails. The configuration is based on a TOML file. Recently I introduce a wizard module, based on you great lib, that help new users to create their own TOML configuration file. So far so good, except that it takes a while to set up an account. If a user exits the wizard flow (either by accident, or if he did a mistake in the form), he needs to start all over again. And the Himalaya wizard flow is quite long. So I try to find a way to be able to save and restore a wizard.

I have an idea on how to implement it, but I wanted to know first if you would be interested in such PR? Not sure if it is part of the dialoguer lib, or if it should be another lib.

[soywod]

Another small first task could be to be able to navigate between prompts. For example to going backward in case of mistake.