It is possible to change the directory of DHC from Buildings.Experimental.DHC to Buildings.DHC thanks to the function move_class. During the process, the images are moved recursively via the function _move_class_directory that calls for each folder the function _move_images_directory. To move the folders, the command line git mv is used.

For example, the package Buildings. Experimental .DHC.EnergyTransferStations.Combined has 2 images, PartialParallel and ChillerBorefield.
During the first iteration, for BaseClasses.PartialParallel, Resources\Images\Experimental\DHC\EnergyTransferStations\Combined\BaseClasses is moved to Resources\Images\DHC\EnergyTransferStations\Combined\BaseClasses, which is the expected behavior.
BUT during the second iteration for ChillerBorefield, instead of moving to Resources\Images\DHC\EnergyTransferStations\Combined, the image goes to Resources\Images\DHC\EnergyTransferStations\Combined\Combined because of the behavior of
git mv (Resources\Images\DHC\EnergyTransferStations\Combined already exists).

The proposed alternative is to use shutil package (part of the standard Python distribution, OS agnostic) instead of git mv.
At the moment the function _git_move is only used with the variable _shutil=True within the function _move_images_directory, but it may fully replace the git mv method.

The downside is that it is not considered in git as a "rename" but as a new file (new folder)/deleted file (old folder).

Also, the function used may be refined to adapt to every context.

Finally, for git use, the following could be used:

_sh(cmd=['git', 'rm', '-r', source], directory=os.path.curdir)
_sh(cmd=['git', 'add', target], directory=os.path.curdir)

Instead of shutil.rmtree(source)