Add S3 static page generator for bucket browsing

Implement Python-based generator that creates static HTML index pages for browsing S3 bucket contents. The generator produces nginx-style directory listings with hierarchical navigation.

.gitignore

@@ -0,0 +1,29 @@
+# Generated output
+output/
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+
+# Virtual environments
+venv/
+env/
+ENV/
+
+# Environment variables
+.env
+.env.local
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db