feat: add initial mcp configuration for gradio-docs server

.mcp.json

@@ -0,0 +1,8 @@
+{
+  "mcpServers": {
+    "gradio-docs": {
+      "type": "http",
+      "url": "https://gradio-docs-mcp.hf.space/gradio_api/mcp/"
+    }
+  }
+}