fix(rust): Correctly display multilevel nested Arrays

[eitsupi]

While trying to get a py-polars-like display on Rust in r-polars, I noticed a lack of functionality on the Rust side.
https://github.com/pola-rs/r-polars/blob/de575b0a72664b5f386fb6dfd72024122179e8e2/src/rust/src/datatypes.rs#L71-L95

The following example shows that the type is not displayed correctly when the Series is displayed in Python.

>>> import polars as pl
>>> pl.Array(pl.List(pl.Array(pl.Int8, (2, 2))), 2)
Array(List(Array(Int8, shape=(2, 2))), shape=(2,))
>>> pl.Series(dtype=pl.Array(pl.List(pl.Array(pl.Int8, (2, 2))), 2))
shape: (0,)
Series: '' [array[i8, 2]]
[
]

This PR should be modified as follows to eliminate the difference in display between Python and Rust.

>>> pl.Series(dtype=pl.Array(pl.List(pl.Array(pl.Int8, (2, 2))), 2))
shape: (0,)
Series: '' [array[list[array[i8, (2, 2)]], 2]]
[
]

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 79.91%. Comparing base (79b91c3) to head (f700fab).
Report is 12 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-core/src/datatypes/dtype.rs	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #18687      +/-   ##
==========================================
- Coverage   79.92%   79.91%   -0.02%     
==========================================
  Files        1513     1513              
  Lines      203334   203343       +9     
  Branches     2892     2892              
==========================================
- Hits       162510   162495      -15     
- Misses      40276    40300      +24     
  Partials      548      548              

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