Add .gitignore for Python project

- Exclude virtual environments
- Exclude Python cache files
- Exclude models directory
- Exclude IDE files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,19 @@
+# Virtual environment
+.venv/
+venv/
+__pycache__/
+*.pyc
+
+# Models directory (if models are downloaded)
+models/
+
+# Python cache
+.pytest_cache/
+*.pyc
+*.pyo
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo