feat: Implement `QuizSubjectView`

[apomalyn]

As a user, I want to be see the subject of a quiz before starting it. I also want the option to not see this page in the future

Requirements

• Update the user to have a preferencesshowQuizSubject
• Implement a QuizSubjectView that:
  • AppBar:
  • have a way to go back to the previous page
  • display the name of the quiz
  • body:
  • have a Topic section that display the quiz's topic
  • have a collaspable Content section with content of the quiz on it
  • a checkbox to not see this page in the future
  • FAB:
  • centered fab button to start the quiz

What needs to be done

• Implement a QuizPreferences model using Freezed (and @embedded from Isar) that have the following properties:
  • bool showQuizSubject, default true
• Update UserPreferences model that have a QuizPreferences quiz properties
• Under src/practice/quiz/subject implement a QuizSubject view and view-model
  • the view should:
  • static const routeName = "/practice/subject"
  • have an AppBar with:
    • an IconButton (icon: Icons.close_rounded) to pop the route
    • a center title: Quiz's subject
  • in the body, have:
    • A Topic section title and underneath the Quiz.topic string displayed
    • A ExpansionTile Content, with inside:
    • a wrapped list of the tags and groups from the QuizContent
  • have a centered FAB with the text START on it (should do nothing for now)

Design

Wireframe of QuizSubjectView


Dependencies

Child of #160

Depends on:

• 163