Add an EditorInfo field to $psEditor

We should add a simple info object to $psEditor so information like editor name and version can be queried from $psEditor. Since we should theoretically support many editors, we could require a few standard fields or we could just make it an object and let editors decide what information they provide.

I'm not saying we should try to implement ISEOptions here as that would be a lot more work. Just an information field along the lines of $PSVersionTable.

该 issue 未指定任何文件、测试或入口点。首先定位现有的 $psEditor 实现及其公共属性，然后检查如何公开编辑器特有的信息。当就 EditorInfo 的结构达成一致，并在不实现 ISEOptions 的情况下公开编辑器名称和版本时，即视为完成。