Fix #889: bears_object() now recognizes array types as objects

[github-actions]

Closes #889

Key Changes:

• registerobject.py: extend bears_object() to return True for array types starting with [
• test_registerobject.py: add test cases for [B, [Ljava/lang/String;, and [[B types
• smoke_test.yml: restore expected Ahmyth detection count to 39

Tests:

• pytest tests/core/struct/test_registerobject.py — all test_bears_object cases pass
• Smoke test against Ahmyth.apk reports 39 behaviors at 100% confidence for Rule 00015

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.31%. Comparing base (94c0d0e) to head (1cbe41a).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #890   +/-   ##
=======================================
  Coverage   81.31%   81.31%           
=======================================
  Files          80       80           
  Lines        6946     6946           
=======================================
  Hits         5648     5648           
  Misses       1298     1298           

Flag	Coverage Δ
unittests	81.31% <100.00%> (ø)

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[pulorsok]

LGTM