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	This commit introduces an `AnswerFeedbackBanner` composable that displays whether a selected answer is correct or wrong. It's integrated into the `Toolbar` section of the `QuizScreen`.
Key changes:
- **UI Layer (`ui:quiz` module):**
    - Created `AnswerFeedbackBanner.kt` composable:
        - Displays "Correct" or "Wrong" text with a green or red background respectively.
        - Uses `Surface` for elevation and `zIndex` to appear above other elements.
    - In `QuizScreen.kt`:
        - Modified the `toolbar` item to include a `Box` that layers the `Toolbar` and the new `AnswerFeedbackBanner`.
        - The `AnswerFeedbackBanner` is shown when `uiState.isAnswerCorrect` is not null.
    - In `QuizScreenViewModel.kt`:
        - Added `isAnswerCorrect: Boolean?` to `ScreenUiState.Success`.
        - Calculated `isAnswerCorrect` based on the selected choice and the correct answer for the current question.
- **Resources (`ui:quiz` module):**
    - Added new string resources for "Correct" and "Wrong" in `strings.xml`.