Update .gitignore with additional exclusions

- Add .gitignore to ignore list
- Add .pytest* patterns for pytest cache files
- Improve gitignore coverage for Python development

.gitignore

@@ -11,12 +11,18 @@ __pycache__/
 *.pyo
 *.pyd
 
+.gitignore
+.pytest*
+
 # Cache files
 .cache/
 */cache/
 **/cache/
 *.cache
 
+venv_new
+venv
+
 # Environment files
 .env
 .env.local