DOC Add polars to the requirements for building documentation

[miguelcsilva]

Reference Issues/PRs

Fixes #28669

What does this implement/fix? Explain your changes.

Adds polars to the documentation as a required dependency to build the documentation.

Any other comments?

Another issue is mentioned in the discussion as something also needing resolving #28669 (comment), however my understanding is that it was not blocking for adding the dependency in the documentation.

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[jeremiedbb]

thanks @miguelcsilva

[jeremiedbb]

Another issue is mentioned in the discussion as something also needing resolving #28669 (comment), however my understanding is that it was not blocking for adding the dependency in the documentation.

I think it means that polars should also be added as doc dependency in pyproject.toml here

scikit-learn/pyproject.toml

Line 40 in f59c503

docs = [

I also notices that polars is only listed as test dependency in _min_dependencies.py, see

scikit-learn/sklearn/_min_dependencies.py

Line 35 in f59c503

"polars": ("0.19.12", "tests"),

It should also be updated with doc.

It can be done in this PR or in a separate one. Ping @lesteve.

[miguelcsilva]

Thanks @jeremiedbb. Updated the PR to add polars as a dependency in both places you mentioned

[lesteve]

Thanks! I pushed a very minor tweak and set auto-merge, so that this PR will be merged automatically when CI is green.