Goal: Implement the type version of `Lodash.uniq()`. `Unique<T>` takes an array `T`, returns the array `T` without repeated values. Source challenge: https://github.com/type-challenges/type-challenges/tree/main/questions/05360-medium-unique Reference explanation: https://github.com/ghaiklor/type-challenges-solutions/blob/main/en/medium-unique.md