Consider supporting SZ #770

I've seen SZ (e.g., https://github.com/szcompressor/SZ3) (note: not to be confused with szip) come up in many of the same contexts as ZFP and Blosc2 as a good lossy compression codec for multidimensional data. In some of my initial tests, it produces impressive compression ratios and good compression speed. It can also be configured in terms of user-defined absolute or relative precision, which is a nice feature for a lossy compression codec.

A Python wrapper for it is here: https://github.com/szcompressor/SZ3/blob/master/tools/pysz/pysz.py