Demos 练习项目，从网上找到的视频和灵感。
仅仅练习的归纳总结
1. Picture cutting
2. Picture selection
3. Picture gestures kneading and dragging
1. Swipe Header to change
2. Swipe tab to switch
1. iOS 17 SwiftUI ScrollView
2. Notify scroll index and locations
1. Task group
2. Task state
3. Actor