튜플 값으로 유니온 타입을 생성하는 제네릭 TupleToUnion<T>를 구현하세요.
예시:
type Arr = ['1', '2', '3']
type Test = TupleToUnion<Arr> // expected to be '1' | '2' | '3'
import type { Equal, Expect } from '@type-challenges/utils'
type cases = [
Expect<Equal<TupleToUnion<[123, '456', true]>, 123 | '456' | true>>,
Expect<Equal<TupleToUnion<[123]>, 123>>,
]