Replace Pandas with Polars

[cclauss]

Feature description

Please create a pull request that removes Pandas and replaces it with Polars?

https://docs.pola.rs/user-guide/migration/pandas

To find at least 8 algorithms that will need to be fixed, use:
% git grep "import pandas" && git grep "pandas import"

• Add Polars: uv sync --upgrade && uv lock #15397
• Modify the Python files
• Remove Pandas from pyproject.toml.