Requirements for better Xarray integration

[dcherian]

This is a tracking issue for stuff that needs to happen for better Xarray integration. For some background, see here and here

• sliding_window_view for rolling:
  • Provide sliding_window_view cupy/cupy#6956 and Add cupy.lib.stride_tricks.sliding_window_view cupy/cupy#7575
  • cupy.lib.stride_tricks.as_strided(...) not consistent with Numpy? cupy/cupy#4825
• flox support for groupby/groupby_bins/resample:
  • CuPy support flox#128 and Dispatch ufunc.at methods cupy/cupy#7561
  • also requires manual dispatching in Xarray: https://github.com/pydata/xarray/blob/ebfa77311280a15d8c455ceb5c8ddc25a2efef39/xarray/util/generate_reductions.py#L354
• Better reprs:
  • Add CUDA device ID to ndarray.__repr__ cupy/cupy#6926;
  • An HTML repr like dask would also be nice.
  • Also a _repr_inline?
• test out & document apply_ufunc with vectorize=True (cupy already supports vectorize)
• Experiment with cuDF indexes instead of Pandas indexes