Change: fixed the read_zarr function for zarr.Group objects

[DiDeoxy]

The spatial_data.read_zarr function raises an error when trying to read a Group from zarr version 2.18.7 as it tries to turn the Group into a Path object directly when Group is not a PathLike object. This adds a check to prevent this bug.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.39%. Comparing base (7604a3d) to head (b22de3f).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #962      +/-   ##
==========================================
+ Coverage   92.14%   92.39%   +0.24%     
==========================================
  Files          48       48              
  Lines        7473     7440      -33     
==========================================
- Hits         6886     6874      -12     
+ Misses        587      566      -21     

Files with missing lines	Coverage Δ
src/spatialdata/_io/io_zarr.py	88.46% <100.00%> (ø)

... and 11 files with indirect coverage changes

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