feat: Implement `SentenceQuestionView`

[apomalyn]

Requirements

Implement the SentenceQuestionView, it should:

• adapt to display either an input text field or a tap-options system

What needs to be done

• Implement SentenceQuestionView view under src/practice/questions:
  • constructor takes:
  • SentenceQuestion question
  • Function(bool askAgain) onAnswered
  • VoidCallback onSkipPressed
  • use the TextQuestionViewModel
  • UI use the QuestionSkeleton as a wrapper:
  • implement the design based on the wireframe
    • use Subject widget
  • based on viewModel.useKeyboard display:
    • the list of TextOption with a line to represent the text input
    • a multiple-line text input

Design

SentenceQuestionView wireframe: keyboard mode


SentenceQuestionView wireframe: option mode


Dependencies

Child of #188

Depends on:

• 169

• 180

• 182

• 189

• 190