dialog: Implement select_dialog with default BlissDialog

This PR

• Rework the code to use a stronger static typing (i think it's really important for structured OOP like that)
  • This have helped to fix some typo
• Rework BlissDialog to expose shortcut from UserSelect (like select_dialog)
• Consequently select_dialog don't have to have a dedicated prompt-toolkit implementation (it just wrap BlissDialog)

select_dialog

It looks the same as before