Create a kedro jupyter-init command to setup a Jupyter kernel for Kedro

[idanov]

Design a kedro jupyter-init command (name is up for debate) which will create a Jupyter Kernel to automatically load the Kedro extension

• Use the jupyter client kernelspec API to do that from Python
• Make the command available only if jupyter is installed, else show a warning Jupyter is not installed
• Add the Kedro icon to the KernelSpec
• Use the work done here: https://github.com/kedro-org/kedro/pull/1355/files#r830876411

[antonymilne]

This should be very easy to do since all the relevant code is in _create_kernel so we just need to create an appropriate CLI command that wraps it.

I mentioned the idea of this to @BenjaminLevyQB a while ago and he seemed to like it. Note that it seems to be possible e.g. on databricks to create (and then select from the notebook) a Jupyter kernel even though you wouldn't execute kedro jupyter notebook/lab itself there, so I think having a separate command to just do the setup here makes sense.

So long as we're keeping the kedro jupyter lab/notebook commands let's make sure the command is part of that group, e.g. kedro jupyter init or kedro jupyter setup.

[jmholzer]

Discussed in backlog grooming 30/01/23:

1. Potentially modify name of command to e.g. setup or kernel.
2. Command to be made part of jupyter group, not a 'root' command.