create a middleware / plugin to display a new screen

[mikbry]

Actually screens are created from a descriptor, see src/client/index.js. Instead a screen could be created from a plugin. And this screen will be initialized and inserted in navigation drawer.

Example

The entry "plugin" is created from a plugin, loaded at the beginning of the app.

It display a simple screen, like this one:

todo
Create all endpoints and middleware to link this type of plugin to the app, in src/shared/containers/app render function:
1 - Attach to routes any screen Plugins (find a way to display them in the right order)
2 - retrieve currentScreen from screen Plugins if displayed
And any others action

[lodelestra]

linked to Zoapp/backend#66 and #111