feat: add comprehensive GitHub workflow and development tools

.gitignore

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+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# Django
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Virtual Environment
+.venv/
+venv/
+env/
+ENV/
+
+# Environment Variables
+.env
+.env.local
+.env.production
+.env.staging
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Docker
+.dockerignore
+
+# Media and Static Files (production)
+media/
+staticfiles/
+
+# Backups
+backups/
+*.tar.gz
+*.sql
+*.dump
+
+# Test Files
+test_*.py
+debug_*.py
+final_*.py
+
+# Logs
+logs/
+*.log
+
+# Node modules (if any frontend)
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Coverage
+htmlcov/
+.coverage
+.coverage.*
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Documentation
+docs/_build/
+
+# PyCharm
+.idea/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json