Add Polars lecture to complement existing Pandas lecture#408

Draft

Copilot wants to merge 31 commits intomainfrom

copilot/fix-407

Commits on Aug 31, 2025

Fix DuplicateError in Polars exercise join logic by using concat and pivot approach

Copilot
and
mmcky
committed

Commits on Sep 1, 2025

initial @mmcky review, in-work
mmcky
committed

Commits on Sep 4, 2025

updates to series section
mmcky
committed

Commits on Sep 5, 2025

edit round of DataFrames
mmcky
committed

Commits on Sep 8, 2025

Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
Update lectures/polars.md

mmcky
and
HumphreyYang
authored
FIX: removed closing brackets
mmcky
committed
add in cell fence removed from comments
mmcky
committed
Merge branch 'main' into copilot/fix-407
mmcky
authored
add in missing url
mmcky
committed
Remove Exercises
mmcky
committed