Add Claude N8N toolkit with Docker mock API server

- Added comprehensive N8N development tools collection
- Added Docker-containerized mock API server for testing
- Added complete documentation and setup guides
- Added mock API server with health checks and data endpoints
- Tools include workflow analyzers, debuggers, and controllers

🤖 Generated with [Claude Code](https://claude.ai/code)

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

claude_n8n/.gitignore

@@ -0,0 +1,41 @@
+# Python cache files
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.Python
+
+# Virtual environments
+venv/
+env/
+ENV/
+
+# IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# System files
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+logs/
+
+# Docker
+.docker/
+
+# Temporary files
+*.tmp
+*.bak
+
+# Environment files
+.env
+.env.local
+
+# Personal credentials (but keep examples)
+**/config/*
+!**/config/*.example
+!**/config/*.sample