Enum type output for cut

[s-banach]

Description

(Not sure if Enum types are merged yet, I know they've been worked on.)
I'm just hoping that the dtype for x.cut() could be an Enum that includes all specified bins, even bins that don't occur in x.

[cmdlineluser]

(Just for reference: Enum was added in #11822)

[stinodego]

Makes sense 👍

[s-banach]

Currently the order of the categories coming out of cut also seems to be broken:

import polars as pl
s = pl.Series([0.7, 0.3, 0.9, 0.2, 0.6])
bins = [0.2, 0.4, 0.6, 0.8]
print(s.cut(bins).sort())

shape: (5,)
Series: '' [cat]
[
	"(0.6, 0.8]"
	"(0.2, 0.4]"
	"(0.8, inf]"
	"(-inf, 0.2]"
	"(0.4, 0.6]"
]