Refactor `apache/shardingsphere-elasticjob-ui` using Flutter to simultaneously implement functionality on both Android and web platforms

Feature Request

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Is your feature request related to a problem?

• See https://github.com/apache/shardingsphere-elasticjob/issues/2448 .

Describe the feature you would like.

• Refactor apache/shardingsphere-elasticjob-ui using Flutter to simultaneously implement functionality on both Android and web platforms.
• For years, none of the maintainers of ShardingSphere have been active enough to know how to maintain a Vue project, resulting in https://github.com/apache/shardingsphere-elasticjob-ui being shelved for a long time. https://github.com/apache/shardingsphere-elasticjob/issues/2448 indicates that https://github.com/apache/shardingsphere-elasticjob-ui is no longer compatible with the main branch of https://github.com/apache/shardingsphere-elasticjob .
• I think fixing https://github.com/apache/shardingsphere-elasticjob-ui/issues/116 is an extremely painful process. Migrating from Vue2 to Vue3 is essentially rewriting the project, and it doesn't bring any benefits to the mobile experience. The only benefit is fixing the CVE. This was already evident during the painful review process of https://github.com/apache/skywalking-banyandb/pull/179.
• Personally, I prefer to reimplement apache/shardingsphere-elasticjob-ui and adopt Flutter, which is more widely used than the Vue ecosystem, to unify the technology stack used by our project at the front end. We still need a real backend project as the gateway for ShardingSphere-Elasticjob-UI to manage connections to ZooKeeper or etcd; this will definitely be a Docker image. The web-based ShardingSphere-Elasticjob-UI will continue to be packaged as a Docker image. The Android-based ShardingSphere-Elasticjob-UI will output an APK file for connecting to remote ShardingSphere-Elasticjob-UI gateway instances.