feat: add KeywordExtractForm and BaiduForm and DuckDuckGoForm #918 (#1477)

### What problem does this PR solve?
feat: add KeywordExtractForm and BaiduForm and DuckDuckGoForm #918


### Type of change


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

web/src/pages/flow/keyword-extract-form/index.tsx

@@ -0,0 +1,20 @@
+import TopNItem from '@/components/top-n-item';
+import { Form } from 'antd';
+import { IOperatorForm } from '../interface';
+
+const KeywordExtractForm = ({ onValuesChange, form }: IOperatorForm) => {
+  return (
+    <Form
+      name="basic"
+      labelCol={{ span: 6 }}
+      wrapperCol={{ span: 18 }}
+      autoComplete="off"
+      form={form}
+      onValuesChange={onValuesChange}
+    >
+      <TopNItem></TopNItem>
+    </Form>
+  );
+};
+
+export default KeywordExtractForm;