Add cloud text recognition (iOS)

CloudTextRecognition.swift

laze var cloudTextDetector: VisionCloudTextDetector = Vision.vision().cloudTextDetector()

func runCloudTextRecognition(with image: UIImage) {
    let visionImage = VisionImage(image: image)
  
    cloudTextDetector.detect(in: visionImage) { (features, error) in
        if let error = error {
            print("Received error: \(error)")
        }

        self.processCloudResult(from: features, error: error)
    }
}