code: func GetText(imgPath string, args ...string) (string, error) {
  	var lang = "eng"
  
  	if len(args) > 0 {
  		lang = args[0]
  		if lang == "zh" {
  			lang = "chi_sim"
  		}
  	}
  
  	body, err := exec.Command("tesseract", imgPath,
  		"stdout", "-l", lang).Output()
  	if err != nil {
  		return "", err
  	}
  	return string(body), nil
  }
docs: /*
  .______    __  .___________..___  ___.      ___      .______
  |   _  \  |  | |           ||   \/   |     /   \     |   _  \
  |  |_)  | |  | `---|  |----`|  \  /  |    /  ^  \    |  |_)  |
  |   _  <  |  |     |  |     |  |\/|  |   /  /_\  \   |   ___/
  |  |_)  | |  |     |  |     |  |  |  |  /  _____  \  |  |
  |______/  |__|     |__|     |__|  |__| /__/     \__\ | _|
  */
  // GetText get the image text by tesseract ocr
  //
  // robotgo.GetText(imgPath, lang string)