Josh Kihm

I did some digging in [generate_aggregations](https://github.com/pydata/xarray/blob/main/xarray/util/generate_aggregations.py), [_aggregations.py](https://github.com/pydata/xarray/blob/main/xarray/core/_aggregations.py), [duck_array_ops.py](https://github.com/pydata/xarray/blob/main/xarray/core/duck_array_ops.py), and [array_api_compat.py](https://github.com/pydata/xarray/blob/main/xarray/core/array_api_compat.py) and I think that it would be hard to shoehorn this into the existing aggregations framework. This is primarily because...