Support for Nested Subfolder Creation in create_session_directory

[LucaKolibius]

I noticed that while create_session_directory supports the creation of subdirectories within a session, it does not currently support the creation of nested subfolders within those subdirectories.

For example, I am trying to adapt SESSION_FOLDERS to contain 00_origiSeshs, with subfolders origSesh00 to origSesh09, and each of these subfolders should contain additional subfolders named "behavior", "neural", and "audio". The current implementation creates the origSeshXX subfolders correctly but does not create the further nested folders.

I think this could be implemented by adding at the end of the function:

for nested_subfolder in nested_subfolders:
    make_folder(recordings_path / subject / experiment / session / subdir / subfolder / nested_subfolder)