Add ipykernel as dev dependency

[tobiasdiez]

It's handy to run the example notebooks.

[Copilot]

Pull Request Overview

This PR adds ipykernel as a development dependency to the project's pyproject.toml file.

• It introduces "ipykernel>=6.29" under the "dev" dependency group to ensure using a recent version.

[jamesbraza]

Hi @tobiasdiez thanks for this PR, down to merge it but just for understanding, can you elaborate on why ipykernel is useful?

[jamesbraza]

Okay I made a fresh .venv and tried to run a Jupyter Notebook in Cursor, and I got:

Running cells with '.venv (Python 3.13.2)' requires the ipykernel and pip package.

I see now, yes this is useful indeed.

[tobiasdiez]

Okay I made a fresh .venv and tried to run a Jupyter Notebook in Cursor, and I got:

Running cells with '.venv (Python 3.13.2)' requires the ipykernel and pip package.

I see now, yes this is useful indeed.

That was also exactly how I discovered it.