feat: restrict classification operators cannot be connected to Answer and other classification #918 (#1294)

### What problem does this PR solve?

feat: restrict classification operators cannot be connected to Answer
and other classification #918

### Type of change

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

web/src/pages/flow/canvas/node/dropdown.tsx

@@ -0,0 +1,47 @@
+import OperateDropdown from '@/components/operate-dropdown';
+import { CopyOutlined } from '@ant-design/icons';
+import { Flex, MenuProps } from 'antd';
+import { useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
+import useGraphStore from '../../store';
+
+interface IProps {
+  id: string;
+}
+
+const NodeDropdown = ({ id }: IProps) => {
+  const { t } = useTranslation();
+  const deleteNodeById = useGraphStore((store) => store.deleteNodeById);
+  const duplicateNodeById = useGraphStore((store) => store.duplicateNode);
+
+  const deleteNode = useCallback(() => {
+    deleteNodeById(id);
+  }, [id, deleteNodeById]);
+
+  const duplicateNode = useCallback(() => {
+    duplicateNodeById(id);
+  }, [id, duplicateNodeById]);
+
+  const items: MenuProps['items'] = [
+    {
+      key: '2',
+      onClick: duplicateNode,
+      label: (
+        <Flex justify={'space-between'}>
+          {t('common.copy')}
+          <CopyOutlined />
+        </Flex>
+      ),
+    },
+  ];
+
+  return (
+    <OperateDropdown
+      iconFontSize={14}
+      deleteItem={deleteNode}
+      items={items}
+    ></OperateDropdown>
+  );
+};
+
+export default NodeDropdown;