Editor encoding inherited from Maven

If we have a Maven project and its POM tag "project.build.sourceEncoding" is different from the editor's default "files.encoding", it would be helpful if VS Code could notify us of this or automatically set the Maven encoding in the "files.encoding" setting of workspace's settings.json file.

Currently I have to check it and change it manually.

首先定位扩展对 Maven 项目的处理逻辑，以及与 VS Code 的工作区设置 files.encoding 的集成点。在 Maven 项目中比较 project.build.sourceEncoding 与编辑器默认值，然后明确完成是指通知、自动更新工作区，还是两者兼有，并验证编码匹配和不匹配时的行为。