text: Title: Incorrect type hint for `value` in `Url.validate()`
  Body: Currently the type hint for `value` in `.validate()` of the url classes is `value: Union[T, np.ndarray, Any]`. 
  It should be `value: Union[T, str, Any]` though, since we actually expect a string here, not a numpy array.
  
  This is the case for: 
  - `AudioUrl`
  - `AnyUrl`
  - `ImageUrl`
  - `VideoUrl`
  - `Url3D`
  