[Feature Request] Add SocketIO support

[Clickative]

Having a took which generated client side SocketIO would be great!
If you are looking to build on top of this please do consider adding SocketIO support.

[revalo]

I think this is a great idea, adding an end-to-end reactive data flow from client to server would be nice. Though it makes less sense given most Flask applications are run in replicas, where global state is usually backed by a database and not memory variables.

Do you have a particular workflow / use-case you'd like to see?