useragent data - client hint

#naver d2

https://d2.naver.com/helloworld/6532276

w3c

https://developer.mozilla.org/en-US/docs/Web/API/NavigatorUAData

https://velog.io/@gonasooc/%EC%95%84%EC%A7%81%EB%8F%84-navigator.userAgent-User-Agent-%EC%B6%95%EC%86%8C%EC%99%80-User-Agent-Client-Hints

log https://browserleaks.com/client-hints

enum DeviceFormFactor {
  DEVICE_FORM_FACTOR_DESKTOP = 0,
  DEVICE_FORM_FACTOR_PHONE = 1,
//여기까지 모바일  
  DEVICE_FORM_FACTOR_TABLET = 2,
  DEVICE_FORM_FACTOR_TV = 3,
  DEVICE_FORM_FACTOR_AUTOMOTIVE = 4,
  DEVICE_FORM_FACTOR_FOLDABLE = 5,
};