Add Juypyter new collaborative feature to Naas

[jravenel]

Since June 9, Jupyter offers collaboration feature to his standard distribution.

The lead of the feature has been writing an article worth reading here : https://blog.jupyter.org/how-we-made-jupyter-notebooks-collaborative-with-yjs-b8dff6a9d8af

And MS is also talking about it here: https://docs.microsoft.com/en-us/visualstudio/liveshare/reference/notebooks

This is a big step forward to have "a la google docs" experience in naas.🚀

#collaborative #userexperience

[jravenel]

Other resources:

• Shared editing with collaborative notebook model. jupyterlab/jupyterlab#10118
  with quick setup guide @Dr0p42 can we try it?

[jravenel]

We need to upgrade repository:

• jupyter-naas single user
• lab
• naas
• cs_conf (private)