.ozx technology compatibility kit

[clbarnes]

Suggested by @joshmoore

A repo with scripts for generating various valid, invalid, and not-recommended .ozx files and potentially a tool for distinguishing between them.

Valid cases

• Single array
• Group hierarchy

Warning cases

• Missing ZIP comment metadata
• Not using ZIP64
• zarr.json file entries not sorted breadth-first
• Ends with .zip
• Uses zip compression

Failure cases

• No zarr.json at the root
• .ozx file contained in archive
• multi-part zip
• ZIP comment suggests zarr.json entries are sorted, but they're not

[clbarnes]

https://github.com/clbarnes/ozx-tck

[joshmoore]

cc: @jwindhager @mkitti @normanrz @thewtex