Builds on @mitnick2012's universal+per-language restructure (PR #742).
- Add Java as a first-class deterministic language in code_quality_checker.py
(LANGUAGE_EXTENSIONS + function/class/method patterns + check_java_specific_smells),
so the documented `--language java` command works instead of erroring on an
invalid choice. Add Java debug + @SuppressWarnings signals to pr_analyzer.py.
- Add Java regression fixtures (sample_java_smells/clean.java) with committed
expected_outputs JSON, mirroring the existing C# fixtures.
- Delete references/{code_review_checklist,coding_standards,common_antipatterns}.md,
now duplicated by rules/universal.md + languages/*.md; repoint README and the
C# clean fixture header at the new structure.
- Document the optional analyzer-wiring + fixture steps in the "Adding a New
Language" guide and restore a Regression Fixtures section in SKILL.md.
https://claude.ai/code/session_01DjuELpoFdFbFscr3kAatni
