map_elements does not support dtype Decimal

[hkad98]

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

from decimal import Decimal
import polars as pl

df = pl.DataFrame(
        {
            "abc": [Decimal("85510.0")],
        }
    )
df.with_columns(pl.col("abc").map_elements(lambda x: x))

Log output

pyo3_runtime.PanicException: dtype Decimal(None, Some(1)) not supported

Issue description

I provided minimal reproducers, which is not a real-world example. I encountered an issue for the use case where I needed to format some columns and the function in map_elements converted and formatted values to str.

Expected behavior

map_elements should work for pl.Decimal

Installed versions

--------Version info---------
Polars:              1.10.0
Index type:          UInt32
Platform:            macOS-14.6.1-arm64-arm-64bit
Python:              3.12.4 (main, Jul  1 2024, 10:39:18) [Clang 15.0.0 (clang-1500.3.9.4)]
LTS CPU:             False

----Optional dependencies----
adbc_driver_manager  <not installed>
altair               <not installed>
cloudpickle          <not installed>
connectorx           <not installed>
deltalake            <not installed>
fastexcel            <not installed>
fsspec               <not installed>
gevent               <not installed>
great_tables         <not installed>
matplotlib           <not installed>
nest_asyncio         <not installed>
numpy                1.26.4
openpyxl             <not installed>
pandas               2.1.4
pyarrow              17.0.0
pydantic             <not installed>
pyiceberg            <not installed>
sqlalchemy           <not installed>
torch                <not installed>
xlsx2csv             <not installed>
xlsxwriter           <not installed>