[Feature] Add friendly tips during maintenance

[kk545141]

MaxKB Version

v1.10.2

Please describe your needs or suggestions for improvements

当应用在维护期间时，增加自定义提示语，并限制用户输入，给用户友好提示。

Please describe the solution you suggest

如在简单配置设置中增加维护模式，并设计自定义输入维护内容框；在高级编排的基本信息框中增加维护按钮和内容框等。

Additional Information

No response

[baixin513]

感谢反馈，后续版本考虑一下。

[shaohuzhang1]

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

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Thanks for the feedback, consider the subsequent version.