compat: Ensure that pandas dtype matches dask when loading data from parquet

[hoxbro]

It makes it so that the following will give the same types before it returned (string[pyarrow], object).

import dask
import spatialpandas.io as sio

dask.config.set({"dataframe.convert-string": True})

# http://s3.amazonaws.com/datashader-data/nyc_buildings.parq.zip
ddf = sio.read_parquet_dask("./data/nyc_buildings.parq")
ddf["type"].dtype, ddf["type"].compute().dtype

Together with holoviz/holoviews#6362 should make it possible to run the NYC Buildings example.

[codecov]

Codecov Report

Attention: Patch coverage is 93.10345% with 2 lines in your changes missing coverage. Please review.

Project coverage is 77.72%. Comparing base (3a1b6eb) to head (6c0f0e1).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
spatialpandas/io/parquet.py	75.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #156      +/-   ##
==========================================
+ Coverage   77.47%   77.72%   +0.24%     
==========================================
  Files          50       50              
  Lines        4844     4871      +27     
==========================================
+ Hits         3753     3786      +33     
+ Misses       1091     1085       -6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[philippjfr]

Looks good!