Compatibility with Notebook

[brichet]

Problem

The chat extension is not compatible with Notebook application currently.

Proposed Solution

Fix the extension to make it work with Notebook

[dlqqq]

This may be helpful: jupyterlab/jupyter-ai#827

[brichet]

For traceability, the @jupyter/react-components (dependency of jupyterlab-chat) was missing form the shared scope of Notebook: jupyter/notebook#7530

[brichet]

An other related issue, which leads to unexpected behavior with the side panel jupyter/notebook#7534

This could be fixed here, but I would expect it to be fixed upstream instead.