Add MCP configuration and project guidelines

- Add .gitignore to exclude docs/ and .mcp.json
- Add .mcp.json.example as template for n8n-mcp server configuration
- Add CLAUDE.md with comprehensive project instructions for AI assistants

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

Co-Authored-By: Claude <noreply@anthropic.com>
Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

.mcp.json.example

@@ -0,0 +1,15 @@
+{
+  "mcpServers": {
+    "n8n-mcp": {
+      "command": "npx",
+      "args": ["n8n-mcp"],
+      "env": {
+        "MCP_MODE": "stdio",
+        "LOG_LEVEL": "error",
+        "DISABLE_CONSOLE_OUTPUT": "true",
+        "N8N_API_URL": "https://your-n8n-instance.com",
+        "N8N_API_KEY": "your-api-key-here"
+      }
+    }
+  }
+}