Feature Request: Add option to not include references import statements

When using the Java Code Lens, or finding references to a class, import statements are included as references. While these are technically references to the class, they are rarely useful and are just added noise to what I'm really interested in, which is where the class is actually being used. It would be nice to have an option to be filter out import statement references.

先从 issue 中描述的 Java Code Lens 和 find-references 行为入手，然后追踪 import 语句在哪里作为引用被包含，以及选项如何暴露。完成标准是用户可以选择排除 import 引用，同时普通引用结果仍然可用。