fix: skip polars cell in WASM ddd_tour notebook

[paddymul]

Summary

• Replace the pl_df_with_weird_types cell in the WASM ddd_tour notebook with an empty DataFrame and explanation text
• Polars has no WASM wheels, so that cell crashed pyodide and broke the entire notebook via marimo's dependency chain

Fixes #644

Test plan

• Verify RTD preview build at /example_notebooks/buckaroo_ddd_tour/ loads and renders
• Verify selecting "pl_df_with_weird_types" in the dropdown shows the explanation instead of crashing

🤖 Generated with Claude Code

[github-actions]

📦 TestPyPI package published

pip install --index-strategy unsafe-best-match --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/ buckaroo==0.13.2.dev23384684210

or with uv:

uv pip install --index-strategy unsafe-best-match --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/ buckaroo==0.13.2.dev23384684210

MCP server for Claude Code

claude mcp add buckaroo-table -- uvx --from "buckaroo[mcp]==0.13.2.dev23384684210" --index-strategy unsafe-best-match --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/ buckaroo-table

📖 Docs preview

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: da504cf438

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

Restore the real dataset outside Pyodide

This cell now always returns pd.DataFrame() instead of calling ddd.pl_df_with_weird_types_as_pandas(), so marimo run docs/example-notebooks/marimo-wasm/buckaroo_ddd_tour.py shows an empty table even on a local CPython install with polars available. That breaks the local/non-WASM use case implied by the new markdown and removes the pl_df_with_weird_types example from the interactive DDD tour referenced in docs/source/articles/dastardly-dataframe-dataset.rst.

Useful? React with 👍 / 👎.