Goal: Given a tuple type `T` that only contains string type, and a type `U`, build an object recursively. Source challenge: https://github.com/type-challenges/type-challenges/tree/main/questions/03188-medium-tuple-to-nested-object Reference explanation: https://github.com/ghaiklor/type-challenges-solutions/blob/main/en/medium-tuple-to-nested-object.md