[Frontend][Lab] Explore creating a JupyterLab extension

[stevenstetzler]

We'd like to extend both the Jupyter Notebook and Jupyter Lab. We've discussed using React in the lab extension.

[stevenstetzler]

I found these resources for kernel communication in JupyterLab:

1. https://groups.google.com/g/jupyter/c/feBOFnrtBCs, which references:
2. https://github.com/twosigma/beakerx/blob/c629239ddb7219decd5a9df662c432ad6df5ef62/js/lab/src/plugin/comm.ts#L77 and
3. https://github.com/twosigma/beakerx/blob/a19c30748d5e6d95db9f7be094bb73db2a8ec386/js/lab/src/plugin/comm.ts

It looks like Kernel communication can be done within a lab extension in a somewhat complicated way.

[stevenstetzler]

Kernel communication example: https://github.com/jupyterlab/extension-examples/tree/master/advanced/kernel-messaging