如何从TypeScript中的字符串常量创建类似联合或枚举的行为？

type Fruit = "Apple" | "Banana" | "Orange";
let favoriteFruit: Fruit;
favoriteFruit = "Apple"; // 合法
favoriteFruit = "Grape"; // 不合法，只能是"Apple"、"Banana"或"Orange"中的一个

enum Fruit {
  Apple = "Apple",
  Banana = "Banana",
  Orange = "Orange",
}

let favoriteFruit: Fruit;
favoriteFruit = Fruit.Apple; // 合法
favoriteFruit = Fruit.Grape; // 不合法，只能是Fruit中的一个值

// 获取枚举的名称和值
console.log(Fruit.Apple); // 输出："Apple"
console.log(Fruit["Apple"]); // 输出："Apple"
console.log(Fruit[0]); // 输出："Apple"

const Fruit = {
  Apple: "Apple",
  Banana: "Banana",
  Orange: "Orange",
} as const;

type Fruit = keyof typeof Fruit;

let favoriteFruit: Fruit;
favoriteFruit = "Apple"; // 合法
favoriteFruit = "Grape"; // 不合法，只能是"Apple"、"Banana"或"Orange"中的一个