Add Kino.Wizard POC

[josevalim]

No description provided.

[josevalim]

@hugobarauna check the docs for a proof of concept for you to try it out. I can flesh it out if we decide to include it in. The first argument to init has an origin, which can be used to identify the actual user.

Note: @jonatanklosko didn't like the function style and would prefer a handle_event style.

[hugobarauna]

@josevalim, I think we can move forward with that. 👍

And if by "jonatanklosko didn't like the function style and would prefer a handle_event style.", it means that the API will be closer to a LiveView API; I agree with him.

While I was trying to use Kino.Wizard, I struggled a little with understanding how to use it. If it's closer to LiveView, it would be easier for me, as someone who has a basic understanding of how to write a LiveView.

[sergey-chechaev]

Are there any plans for multi-select? Maybe there is a workaround, such as using a smart cell?

#380