Add useWatch hook

[mununki]

//useWatch
type useWatchParamsOfInputs = {
  name: variantOfInputs,
  control: controlOfInputs=?,
  defaultValue: valueOfInputs=?,
  disabled: bool=?,
  exact: bool=?,
}
@module("react-hook-form")
external useWatchOfInputs: useWatchParamsOfInputs => option<valueOfInputs>