Add sBEE metric and bump version to 0.6.0

[MekanMyradov]

Summary

• Add sBEE (single-cell Batch Effect Evaluator) as a new batch correction metric
• Wire sbee into the benchmark pipeline (BatchCorrection, MetricAnnDataAPI, metric_name_cleaner) using 90-neighbor resolution
• Add tests (test_sbee.py, update test_benchmarker.py)
• Add API docs entry, changelog entry, and DOI citation in references.bib

Test plan

• All tests pass (pytest)
• Docs build successfully (cd docs && make html)
• Pre-commit hooks pass

[codecov]

Codecov Report

❌ Patch coverage is 98.76543% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 91.32%. Comparing base (e15177d) to head (3a80be8).

Files with missing lines	Patch %	Lines
src/scib_metrics/metrics/_sbee.py	98.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #267      +/-   ##
==========================================
+ Coverage   90.72%   91.32%   +0.59%     
==========================================
  Files          26       27       +1     
  Lines        1014     1095      +81     
==========================================
+ Hits          920     1000      +80     
- Misses         94       95       +1     

Files with missing lines	Coverage Δ
src/scib_metrics/__init__.py	100.00% <ø> (ø)
src/scib_metrics/benchmark/_core.py	95.40% <100.00%> (+0.05%)	⬆️
src/scib_metrics/metrics/__init__.py	100.00% <100.00%> (ø)
src/scib_metrics/metrics/_sbee.py	98.71% <98.71%> (ø)

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[MekanMyradov]

Dear @ori-kron-wis,

Can you please approve/reject the PR.

Thanks
Mekan

[ori-kron-wis]

We will review it in the coming days , thank you @MekanMyradov