shared custom environment

[Wilfried_T]

When a custom environment is created, it can only be used in the workspace in which it was created.
It would be nice to be able to share it with other environments.
It would be practical because you could have functions that could be reused in several notebooks in different workspaces. To avoid rewriting these functions, it would be a good idea to put them in a single file that we can transform into a library in our environment and then share with other workspaces.