DOC: How to read data into pandas / dask / xarray

Is there a good reference or a ckanapi function on how to read datasets from a CKAN instance into pandas and/or dask and/or xarray?

Pandas
- ``pandas.read_json("https://url.to/dataset.json")``
- https://pandas.pydata.org/pandas-docs/stable/user_guide/io.html#json
- https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.read_json.html
- https://pandas.pydata.org/pandas-docs/stable/ecosystem.html#api
- https://github.com/sinhrks/pyopendata/issues/3
- pandas-datareader, pandaSDMX, fredapi, quandl (Toronto)

Dask
- ``dask.dataframe.read_json("https://url.to/dataset.json")``
- https://docs.dask.org/en/latest/remote-data-services.html
- https://filesystem-spec.readthedocs.io/en/latest/features.html#instance-caching , arrow
- https://docs.dask.org/en/latest/dataframe-api.html#dask.dataframe.read_json
- https://docs.dask.org/en/latest/dataframe.html#common-uses-and-anti-uses
- https://docs.dask.org/en/latest/bag.html
- https://examples.dask.org/bag.html
- https://examples.dask.org/applications/json-data-on-the-web.html
- https://ml.dask.org/ (dask + {scikit-learn, TensorFlow, XGBoost})

xarray
- https://xarray.pydata.org/en/stable/generated/xarray.open_dataset.html
- https://xarray.pydata.org/en/stable/generated/xarray.Dataset.from_dataframe.html
- https://xarray.pydata.org/en/stable/generated/xarray.Dataset.from_dict.html
- https://xarray.pydata.org/en/stable/data-structures.html#dataarray

Caching
- https://github.com/reclosedev/requests-cache (sqlite)
- https://pandas-datareader.readthedocs.io/en/latest/cache.html
- https://github.com/ionrock/cachecontrol (dict, file, redis, [sqlite](https://github.com/ishitatsuyuki/cachecontrol-sqlite))

The issue names no repository files, tests, or documentation entry point. First inspect the existing ckanapi documentation and API surface to determine whether a reading helper already exists, then compare the requested pandas, Dask, and xarray workflows. Done should be a focused reference explaining supported loading approaches and any relevant caching behavior.

Written by the indexing model from the issue text.