Implement type CheckRepeatedChars<T> which will return whether type T contains duplicated member
For example:
type CheckRepeatedTuple<[1, 2, 3]> // false
type CheckRepeatedTuple<[1, 2, 1]> // true
import type { Equal, Expect } from '@type-challenges/utils'
type cases = [
Expect<Equal<CheckRepeatedTuple<[number, number, string, boolean]>, true>>,
Expect<Equal<CheckRepeatedTuple<[number, string]>, false>>,
Expect<Equal<CheckRepeatedTuple<[1, 2, 3]>, false>>,
Expect<Equal<CheckRepeatedTuple<[1, 2, 1]>, true>>,
Expect<Equal<CheckRepeatedTuple<[]>, false>>,
Expect<Equal<CheckRepeatedTuple<string[]>, false>>,
Expect<Equal<CheckRepeatedTuple<[number, 1, string, '1', boolean, true, false, unknown, any]>, false>>,
Expect<Equal<CheckRepeatedTuple<[never, any, never]>, true>>,
]