Feat: Add background color to GraphRag configuration #4980 (#4981)

### What problem does this PR solve?

Feat: Add background color to GraphRag configuration #4980

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/flow/hooks/use-open-document.ts

@@ -0,0 +1,12 @@
+import { useCallback } from 'react';
+
+export function useOpenDocument() {
+  const openDocument = useCallback(() => {
+    window.open(
+      'https://ragflow.io/docs/dev/category/agent-components',
+      '_blank',
+    );
+  }, []);
+
+  return openDocument;
+}