update for zarrv3 branch

[melonora]

Pr to update for the spatialdata zarr v3 branch

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.06%. Comparing base (595eea7) to head (b543af7).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #324   +/-   ##
=======================================
  Coverage   49.06%   49.06%           
=======================================
  Files          26       26           
  Lines        2686     2686           
=======================================
  Hits         1318     1318           
  Misses       1368     1368           

Files with missing lines	Coverage Δ
src/spatialdata_io/converters/legacy_anndata.py	51.77% <100.00%> (ø)

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