【SwiftUI】Listの機能 – 行の並べ替え、削除 https://shuhey-hashimoto.com/swiftui/swiftui-list%e3%81%ae%e6%a9%9f%e8%83%bd-%e8%a1%8c%e3%81%ae%e4%b8%a6%e3%81%b9%e6%9b%bf%e3%81%88%e3%81%a8%e5%89%8a%e9%99%a4/