[v3] Develop integration test suite that checks compatibility with downstream libraries

[jhamman]

Open to ideas on how best to structure this but the idea is that we should be testing with libraries that depend on Zarr.

Examples:

• Xarray
• Dask
• ?

[dcherian]

Here's one approach.

I run Xarray's groupby tests in flox's CI

https://github.com/xarray-contrib/flox/blob/603ad2cadf284d4a5bbae182fe69a7e691a12f6d/.github/workflows/ci.yaml#L104-L155

[sanketverma1704]

A couple of other libraries for downstream testing:

• Anndata
• ASDF-Zarr