Refactor swipe-to-dismiss examples (#486) (#458)

* Refactor swipe-to-dismiss examples

- Update TodoItem data class for better readability
- Refactor the swipe item to improve the overall performance and readability
- Refactor SwipeItemExample for better readability
- Refactor SwipeCardItemExample and rename it to SwipeItemWithAnimationExample for better description
- Modify the swipe to dismiss animation for better user experience
- Add comments to make code easy to read

* Apply Spotless

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Co-authored-by: Jolanda Verhoef <JolandaVerhoef@users.noreply.github.com>
Co-authored-by: JolandaVerhoef <6952116+JolandaVerhoef@users.noreply.github.com>

Author: compose-devrel-github-bot