marimo export ipynb should include outputs, cell order, and other metadata

[mscolnick]

Description

marimo export ipynb should support --include-outputs.

We should also include more metadata to be more easily integrated with tools that can leverage this.

Suggested solution

marimo export ipynb notebook.py -o notebook.ipynb --include-outputs

This will run marimo through once and include their HTML outputs. We may need to include an additional cell that contains css/js links that by default will be fetched from a cdn.

Alternative

No response

Additional context

No response