⬆️ Add compatibility with zarr v3

[Koncopd]

Closes #2335

This updates the internals of our code to support anndata>=0.12.0rc1 with zarr>=3.0.0.

lamindb still has anndata<=1.14.0 with zarr<3.0.0 in the requirements, but nothing breaks if newer anndata or zarr are installed.

Also refactors some zarr-related code.

[Koncopd]

Ok, from the side of lamindb the compatibility can be added without much problems.

[codecov]

Codecov Report

Attention: Patch coverage is 73.33333% with 8 lines in your changes missing coverage. Please review.

Project coverage is 92.13%. Comparing base (c081cbd) to head (aa2ae2e).
Report is 34 commits behind head on main.

Files with missing lines	Patch %	Lines
lamindb/core/storage/_zarr.py	76.19%	5 Missing ⚠️
lamindb/core/loaders.py	0.00%	1 Missing ⚠️
lamindb/core/storage/_anndata_accessor.py	85.71%	1 Missing ⚠️
lamindb/models/artifact.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2711      +/-   ##
==========================================
+ Coverage   91.94%   92.13%   +0.19%     
==========================================
  Files          70       71       +1     
  Lines       10717     9629    -1088     
==========================================
- Hits         9854     8872     -982     
+ Misses        863      757     -106     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[github-actions]

Deployment URL: https://5e31f432.lamindb.pages.dev

[falexwolf]

Looks great! 😄