Add support for JupyterLab 4.x

[ptitzler]

Is your feature request related to a problem? Please describe. JupyterLab 4.0 is now available as a beta. We need to evaluate that release and identify what it takes to leverage that release.

• [ ] installation documentation and repository readme https://github.com/elyra-ai/elyra/pull/3145

Resources:

• JupyterLab extension v3 -> v4 migration guide
• Elyra issues tagged with external:jupyterlab 4.0

Extensions:

• [ ] Jupyterlab-lsp - current version of jupyterlab-lsp python package depends on jupyterlab being <v4-alpha, v5 release is required for JL 4.0 support tracker

[LiutongZhou]

Jupyterlab 4.0.2 is released. Looking forward to V4 support

[dhendry]

+1 for JupyterLab 4.x support.

Thanks so much for a useful set of extensions!

[skukhtichev]

@lresende There is a jupyterlab-lsp dependency mentioned in the description. jupyterlab-lsp 5.0 with JL4.0 support was released some time ago. Is there a timeline for enabling JupyteLab 4 support in Elyra?