reset method
Resets the view model to its initial state.
Clears all classification results, selected image, and error messages. Notifies listeners after resetting the state.
Implementation
void reset() {
_state = ClassificationState.initial;
_imageFile = null;
_result = null;
_errorMessage = null;
_submissionResult = null;
_webPredictionResult = null;
_isFetchingWebPrediction = false;
notifyListeners();
}