Use builtin UUID type for uuid format in schemas

[PhilipTrauner]

Formats such as "email", "uuid", and so on, MAY be used even though undefined by this specification.
— Specification

The builtin UUID type is already Codable, so unless I'm missing something this should just work.

import Foundation

struct Model: Codable {
    let id: UUID
}

let json = """
{
    "id": "f44d74e7-a8ca-4d5d-9d7d-6b28fc28b552"
}
"""

let decoder = JSONDecoder()
let decoded = try! decoder.decode(Model.self, from: json.data(using: .utf8)!)

let encoder = JSONEncoder()
let encodedData = try! encoder.encode(decoded)
let encodedString = String(data: encodedData, encoding: .utf8)

[kean]

Looks good, thanks @PhilipTrauner. I'll review the other MR later today too.