Add Container.console, a shell in a notebook cell - #102

Process completed with exit code 1.

chi/__init__.py:1:1: I001 Import block is un-sorted or un-formatted help: Organize imports

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-python@v5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/