UX revamp - onboarding

(note: this is the original onboarding ticket, that got postponed out of Qt Creator 17 on account of resourcing issues, the Qt Creator 17 content was seriously stripped down, overview content separated in Qt Creator 18 timeframe)

What

• implement the first phase of onboarding new users with a prompting wizard that allows the user to change and validate their environment 
• Updated UI tour that presents the Qt Creator UI
• Link to Figma UI design

Why

• The current onboarding is incomplete, especially to novice users
  • Specifically, Qt Creator may be in a unusable state (e.g. missing framework entirely or other components) 

Dependencies

• UX revamp - notifications 
• Upon starting Qt Creator for the first time, Qt Creator shall prompt the user for answers to ensure that their tool has been set up properly
  • content
    • theme & language selection 
    • Qt version display / selection (and confirmation that it is what the user expects)
    • telemetry & sentry use confirmation
    • personalization questions
      • start with targets 
    • target display (and confirmation that it is what the user expects) 
    • summary of changes & possible prompt to restart 
  • The user can re-run this setup wizard later (initiated from the overview tab?) 
  • The confirmation pages provide means to invoke maintenance tool to change the environment when necessary (do not implement directly in Creator) 

User stories / tasks

TBD

Open issues

• Are recommendations displayed also in the other tabs (learning etc)?