[Feature] Hope the node adds traversal nodes

[zhoujun681]

MaxKB Version

v1.10.1-lts

Please describe your needs or suggestions for improvements

知识库检索内容通常是一个List，虽然可以自定义函数处理每个元素，但是这样局限性很大。如果能通过遍历节点，然后连接其他节点来处理每个元素，最后再汇总成一个新的List，会很方便。

Please describe the solution you suggest

No response

Additional Information

No response

[baixin513]

感谢反馈，后续考虑一下

[shaohuzhang1]

Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

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Thanks for the feedback, please consider it later

[baixin513]

循环节点，同issue #1424

[shaohuzhang1]

Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

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Loop node, same as issue #1424