export_khiops_dictionary_file fails to export when directory does not exist

[n-voisine]

The function export_khiops_dictionary_file throws a FileNotFoundError when attempting to export the dictionary to a path where the target directory does not exist. This issue occurs on both Windows and Linux systems.

error message : FileNotFoundError: [Errno 2] No such file or directory: '\log\dico_in.kdic'

like other functions this function should automatically create the necessary directories before attempting to write the file
solution : call os.makedirs(os.path.dirname(filepath), exist_ok=True) before to write file

[popescu-v]

To solve this, we could:

• either allow the user to require the creation of the directories by adding a flag to the Dictionary.export_dictionary_file function. This flag would then propagate to the LocalFilesystemResource.write function in core/internals/filesystems.py in order instruct it to create the parent directory structure if absent.
• or have the LocalFilesystemResource.write directly create the dirname of the path given as argument, if it does not exist.

The first solution would entail keeping the current behavior by default, at the cost of updating the API. The second solution would not incur the API update cost, at the cost of changing the behavior.

[popescu-v]

The second solution is chosen by consensus.