pola-rs/polars: Python Polars 0.17.8

Performance improvements less naive count (#8473) parallelise dataframe describe method (#8465) parallelize almost all flattens (#8468) optimize horizontal min/max (#8463) reinstate old behavior in numeric group-tuples (#8445) ✨ Enhancements apply thousand-separators to "shape" html output, consi… (#8472) let duration string accept "1mo_saturating" (#8469) add dt.month_start and dt.month_end (#8435) add SQL support for cumulative functions (#8457) improve utility of dtype groups (#8453) improved parametric Decimal strategy (#8444) improved hypothesis/parametric testing profile registration (#8433) Bug fixes fix error message of offset_by if offsetting by negative number of months (#8464) fix sorted warning (#8462) improve utility of dtype groups (#8453) ️ Other improvements bubble up time_iter errors (#8467) additional test coverage for dtype groups (#8458) integrate live refresh/reload facility while writing docs (#8452) add a series of parametric/hypothesis example tests to the main testing docs page (#8454) parametric testing docs improvements (#8447) improved parametric Decimal strategy (#8444) improved hypothesis/parametric testing profile registration (#8433) Thank you to all our contributors for making this release possible! @MarcoGorelli, @alexander-beedie, @ritchie46, @universalmind303 and @utkarshgupta13