SlideTransition
https://api.flutter.dev/flutter/widgets/SlideTransition-class.html
Animation#drive
https://api.flutter.dev/flutter/animation/Animation/drive.html
Offset
https://api.flutter.dev/flutter/dart-ui/Offset-class.html
トゥイーンアニメーション機能
https://www.adobe.com/jp/creativecloud/video/discover/tweening.html