chore: add .vectors to WeaviateObject interface

Author: bevzzz

src/main/java/io/weaviate/client6/v1/api/collections/WeaviateObject.java

@@ -4,4 +4,6 @@ public interface WeaviateObject {
   String uuid();
 
   String collection();
+
+  Vectors vectors();
 }

src/main/java/io/weaviate/client6/v1/api/collections/query/ReadWeaviateObject.java

@@ -19,6 +19,7 @@ public String uuid() {
   }
 
   /** Shorthand for accesing objects's vectors from metadata. */
+  @Override
   public Vectors vectors() {
     return metadata.vectors();
   }