[konstntokas]

Migrated to the Zarr v3 Python API. Supports writing Zarr v2 and v3 stores, with Zarr v2 as the default.

closes #111

Checklist (strike out non-applicable):

• Changes documented in CHANGES.md
• Related issue exists and is referred to in the PR description and CHANGES.md
• Added docstrings and API docs for any new/modified user-facing classes and functions
• Changes/features documented in docs/*
• Unit-tests adapted/added for changes/features
• Test coverage remains or increases (target 100%)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (e9c8677) to head (004a291).

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #112      +/-   ##
===========================================
+ Coverage   99.92%   100.00%   +0.07%     
===========================================
  Files          30        30              
  Lines        1418      1449      +31     
===========================================
+ Hits         1417      1449      +32     
+ Misses          1         0       -1     

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