feat: add share and import features

[TheauW]

This PR introduces two new buttons that allows to easily share and import application state. These features enable simple and quick exchange of selected applications between users.

• The share button generates a sharable representations of the current application state, which can be copied and sent to others.
• The import button allows users to load a previously shared state, restoring the same application configuration

[aldbr]

It looks great! Thank you very much 🙂

Could you add some documentation for the developers to explain how to create a state in an "Application" component (e.g. JobMonitor) please?

• As a developer, do we need to implement exportState and setState in an application? (it will be very similar to every applications, am I wrong? Would it make sense to move these functions elsewhere?)
• How am I supposed to save the state of my application? You can explain the session storage and the <app_id>_State, and how you add/remove details from there (you can use simple examples to highlight the concepts).

Thanks again!