Goal: Implement the built-in `Pick<T, K>` generic without using it. Constructs a type by picking the set of properties `K` from `T`. For example: Source challenge: https://github.com/type-challenges/type-challenges/tree/main/questions/00004-easy-pick Reference explanation: https://github.com/ghaiklor/type-challenges-solutions/blob/main/en/easy-pick.md