🐛 Temptative solution for basic annotation inspection

[jmle]

Partially fixes #460

This PR would introduce a new field to the java.referenced condition. For instance, the following condition

    java.referenced:
      pattern: org.home.Bean*
      location: CLASS
      annotated:
        pattern: org.home.BeanAnnotation

would match this:

package org.home;

@org.home.BeanAnnotation
public class BeanClass {
  // ...
}

Possible values for annotated locations are CLASS, METHOD and FIELD.

⚠️ When using FIELD in java.referenced.location, the user might expect to be able to put a type in the pattern field, as in "please look for any field of type type that has annotation annotated.pattern. That is not possible at the moment, since the LS only returns the name of the field.