Difference between 0i and -0i when used as .rolling() offset

[cmdlineluser]

Checks

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of Polars.

Reproducible example

import polars as pl

df = pl.DataFrame({"foo": [1] * 3}).sort("foo").with_row_index()

df.rolling(index_column="foo", period="1i", offset="0i").agg("index")
# shape: (3, 2)
# ┌─────┬───────────┐
# │ foo ┆ index     │
# │ --- ┆ ---       │
# │ i64 ┆ list[u32] │
# ╞═════╪═══════════╡
# │ 1   ┆ []        │
# │ 1   ┆ []        │
# │ 1   ┆ []        │
# └─────┴───────────┘

df.rolling(index_column="foo", period="1i", offset="-0i").agg("index")
# shape: (3, 2)
# ┌─────┬───────────┐
# │ foo ┆ index     │
# │ --- ┆ ---       │
# │ i64 ┆ list[u32] │
# ╞═════╪═══════════╡
# │ 1   ┆ [0, 1, 2] │
# │ 1   ┆ [1, 2]    │
# │ 1   ┆ [2]       │
# └─────┴───────────┘

Log output

No response

Issue description

"positive zero" and "negative zero" offset values behave differently.

The -0i seems to end up equivalent to an "UNBOUNDED FOLLOWING" which some people have requested previously, so could potientially useful - but doesn't seem intended in this case.

Expected behavior

I'm not sure.

Installed versions

--------Version info---------
Polars:               0.20.25
Index type:           UInt32
Platform:             macOS-13.6.1-arm64-arm-64bit
Python:               3.12.2 (main, Feb  6 2024, 20:19:44) [Clang 15.0.0 (clang-1500.1.0.2.5)]

----Optional dependencies----
adbc_driver_manager:  <not installed>
cloudpickle:          <not installed>
connectorx:           <not installed>
deltalake:            <not installed>
fastexcel:            <not installed>
fsspec:               <not installed>
gevent:               <not installed>
hvplot:               <not installed>
matplotlib:           <not installed>
nest_asyncio:         <not installed>
numpy:                1.26.4
openpyxl:             <not installed>
pandas:               2.2.1
pyarrow:              15.0.2
pydantic:             <not installed>
pyiceberg:            <not installed>
pyxlsb:               <not installed>
sqlalchemy:           <not installed>
xlsx2csv:             <not installed>
xlsxwriter:           <not installed>