chore: add __pycache__ to .gitignore and remove sys.path hack in tests

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

website/tests/test_fetch_github_stars.py

@@ -1,10 +1,7 @@
 """Tests for fetch_github_stars module."""
 
 import json
-import os
-import sys
 
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
 from fetch_github_stars import (
     build_graphql_query,
     extract_github_repos,