feat: Add Polars to the list of Python libraries

[ivintoiu]

What is this Python project?

Polars is a high-performance DataFrame library for Python and Rust, known for its multi-threaded execution and efficient query engine.

What's the difference between this Python project and similar ones?

In comparison with pandas:

• Multi-thread and Rust based backend
• Supports lazy execution for optimized query planning
• Strong type with arrow based on Apache Arow

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