chore: ignore pytest/coverage/ruff caches

Author: kanywst

.coverage

@@ -4,6 +4,12 @@ __pycache__/
 .venv/
 venv/
 .env
+.pytest_cache/
+.ruff_cache/
+.coverage
+coverage.xml
+htmlcov/
+*.egg-info/
 
 # node / astro
 node_modules/