Add .gitignore file for ignoring test, bug, and other unnecessary files

.gitignore

@@ -0,0 +1,67 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Logs
+*.log
+integrated_product_system.log
+
+# Databases
+*.db
+*.sqlite
+
+# IDE
+.trae/
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Test files
+*test*.py
+*Test*.py
+pytest_cache/
+.tox/
+.coverage
+coverage.xml
+
+# Temporary files
+*.tmp
+*.temp
+*.bak
+*.swp
+*.swo
+*~
+temp_*.txt
+
+# Bug and debug files
+*debug*.png
+*bug*.txt
+
+# Batch files
+*.bat
+
+# Output files
+*.out
+*.output
+
+# Environment
+.env
+.env.local
+.env.*.local
+
+# Documentation build
+_build/
+build/
+dist/
+*.egg-info/
+
+# Other
+2025年12月*.txt
+*.png