feat: Add database setup guide and local configuration files

- Added DATABASE_SETUP.md with comprehensive guide for PostgreSQL and Redis installation on Windows
- Created .claude/settings.local.json with permission settings for pytest and database fix scripts
- Updated .gitignore to exclude .env.backup file
- Included database connection test utilities in lyra/database_setup.py
- Added environment variable configuration examples for local development

lyra/testing/__init__.py

@@ -0,0 +1,12 @@
+"""
+Lyra Testing Module
+
+Comprehensive testing and behavior analysis for Lyra's human-like characteristics.
+"""
+
+from .behavior_tests import LyraBehaviorTester, create_standard_test_cases
+
+__all__ = [
+    "LyraBehaviorTester",
+    "create_standard_test_cases"
+]