feat: Update based on polars py-1.32.0

[eitsupi]

No description provided.

[eitsupi]

This involves a lot of big breaking changes on the Rust side, and looks like it's going to be a very tough undertaking...

• Categorical/Enum (refactor: Rework Categorical/Enum to use (Frozen)Categories polars#23016, feat: Add Categories on the Python side polars#23543)
• Selector (refactor: Make Selector a concrete part of the DSL polars#23351)
• *_to_struct (refactor: Make list.to_struct and arr.to_struct serializable polars#23504)
• PlPath (refactor: Add new PlPath that abstracts over PathBuf and URI polars#23280)

[etiennebacher]

I'll have more time to contribute to this in about 2 weeks

[Copilot]

Pull Request Overview

This PR updates the R polars package to be compatible with polars-py version 1.32.0 prerelease. The changes primarily involve adapting to underlying Polars Rust library updates, including new API changes, deprecations, and selector system modifications.

• Updates Rust dependencies to a newer polars commit
• Implements a new selector system with dedicated PlRSelector class
• Updates error message formats and test expectations
• Modifies categorical data handling to remove deprecated ordering features

Reviewed Changes

Copilot reviewed 116 out of 117 changed files in this pull request and generated 6 comments.

File	Description
tests/	Updates test expectations for error messages, column ordering, and selector behavior
src/rust/	Major refactoring to implement new selector system and update polars API usage
man/	Documentation updates for deprecated parameters and new selector features

Comments suppressed due to low confidence (1)

src/rust/src/expr/selector.rs:216

• [nitpick] The function name empty should be more descriptive. Consider renaming to empty_selector or similar to clarify its purpose in the selector context.

        Ok(dsl::empty().into())

[eitsupi]

The documentation is not perfect, but I want to incorporate updates to the Rust side into main as soon as possible, so I'm merging it.