Support group exclusive selections in inquirer.checkbox and inquirer.select workflows.

[pete312]

Feature request : group exclusive selections.

relating to the SO question about this.

https://stackoverflow.com/questions/76525077/how-to-mutualy-exclude-choices-in-inquirerpy?noredirect=1#comment134928834_76525077

Basically a great feature to add would be a workflow to un-toggle options in a Choice list which are in a mutually exclusive group. I.e. as user selects an option, it toggles off any other selected option in its grouping. This would be intuitive to the user and would simplify any validation.

This could be an option on the Choice.

     choices = [
          Choice("warning", name="Important only",   exclusive_group='verbosity'),
          Choice("info", name="Informational",             exclusive_group='verbosity'),
          Choice("verbose", name="Verbose",                exclusive_group='verbosity')
          Separator(),
          Choice("paging",       name="Paged output",    exclusive_group='preferences'),
          Choice("stream",     name="Stream output",  exclusive_group='preferences')
     ]

     display_settings = inquirer.checkbox(
                message="Select display settings:",
                choices=choices,
                invalid_message="just select 1 from each section                 ",
                validate=display_setting_validation            
            ).execute()

This would have 2 multi select menus for the user, making 2 values in the display_settings list. example ["warning", "paging"]