Codable.swift

extension Sword {
    init(from decoder: Decoder) throws {
        let values = try decoder.container(keyedBy: CodingKeys.self)
        name = try values.decode(String.self, forKey: .name)
        size = try values.decode(Int.self, forKey: .size)
        isValyrianSteel = try values.decode(Bool.self, forKey: .isValyrianSteel)
    }
}