Implement a type IsTuple, which takes an input type T and returns whether T is tuple type.
For example:
type case1 = IsTuple<[number]> // true
type case2 = IsTuple<readonly [number]> // true
type case3 = IsTuple<number[]> // false
import type { Equal, Expect } from '@type-challenges/utils'
type cases = [
Expect<Equal<IsTuple<[]>, true>>,
Expect<Equal<IsTuple<[number]>, true>>,
Expect<Equal<IsTuple<readonly [1]>, true>>,
Expect<Equal<IsTuple<{ length: 1 }>, false>>,
Expect<Equal<IsTuple<number[]>, false>>,
Expect<Equal<IsTuple<never>, false>>,
]