Public API for `zarr.core.buffer`

[TomAugspurger]

Zarr version

v3

Numcodecs version

na

Python Version

na

Operating System

na

Installation

na

Description

Over in pydata/xarray#10079, I'd like to use zarr.core.buffer.cpu. But after #2621 zarr.core is offically private.

I'd suggest zarr.buffer.{cpu,gpu} as a public API for these modules. Similar-ish to zarr.storage.

Steps to reproduce

na

Additional output

xref #2641, but that covered the ABC. In this case I'll need the concrete implementation (CPU specifically).

[jhamman]

Yes! Let's do this.