Initial commit: n8n MCP server for VS Code integration

- Implemented MCP server with 8 n8n tools
- Added n8n API client for workflow operations
- Configured VS Code settings with API authentication
- Added comprehensive documentation and setup guides
- Tested and verified connection to n8n instance

.vscode/settings.json

@@ -0,0 +1,14 @@
+{
+  "mcpServers": {
+    "n8n": {
+      "command": "node",
+      "args": [
+        "/home/rwiegand/Nextcloud/entwicklung/Werkzeuge/n8n_vscode_integration/dist/index.js"
+      ],
+      "env": {
+        "N8N_BASE_URL": "http://srvdocker02:8098",
+        "N8N_API_KEY": "n8n_api_42f1838c1e2de90cadcb669f78083de92697a85322c0b6009ad2e55760db992ab0bf61515a3cf0e1"
+      }
+    }
+  }
+}