Add progress indicator for cellfun operations (NNDataset.INPUTS) #1806
Description
Lengthy cellfun operations, particularly those applied to NNDataset.INPUTS, currently run without any visible progress, leaving users uncertain about runtime or process completion—especially for large datasets.
Add a progress indicator or waitbar for cellfun calls (see: MATLAB forum discussion). The indicator should display during time-consuming dataset loading or transformation steps, ideally showing batch or cell index progression, and close automatically when finished.