Jack Wright 6c1c7f9509
Added expression support for polars cumulative (#13799)
# Description
Provides the ability to use `polars cumulative` as an expression:

<img width="1266" alt="Screenshot 2024-09-06 at 17 47 15"
src="https://github.com/user-attachments/assets/73c11f79-598c-4efa-bfcd-755e536ead66">

# User-Facing Changes
- `polars cumulative` can now be used as an expression.
2024-09-06 22:03:51 -05:00
..
2024-09-06 13:46:37 -07:00