Replace Extensions class with JsonNode in PdlPersonBolk

The commit includes changes in the PdlPersonBolk domain where the 'Extensions' class has been replaced with 'JsonNode'. It also removed some unused import statements. The use of JsonNode simplifies the class structure and enhances the flexibility in handling the 'extensions' data in this domain class.

apps/dolly-backend/src/main/java/no/nav/dolly/domain/PdlPersonBolk.java

@@ -1,23 +1,21 @@
 package no.nav.dolly.domain;
 
+import com.fasterxml.jackson.databind.JsonNode;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
-import java.util.ArrayList;
 import java.util.List;
 
-import static java.util.Objects.isNull;
-
 @Data
 @Builder
 @NoArgsConstructor
 @AllArgsConstructor
 public class PdlPersonBolk {
 
     private Data data;
-    private Extensions extensions;
+    private JsonNode extensions;
 
     @lombok.Data
     @Builder
@@ -30,36 +28,6 @@ public static class Data {
         private List<IdenterBolk> hentIdenterBolk;
     }
 
-    @lombok.Data
-    @Builder
-    @NoArgsConstructor
-    @AllArgsConstructor
-    public static class Extensions {
-
-        private List<Warning> warnings;
-
-        public List<Warning> getWarnings() {
-
-            if (isNull(warnings)) {
-                warnings = new ArrayList<>();
-            }
-            return warnings;
-        }
-    }
-
-    @lombok.Data
-    @Builder
-    @NoArgsConstructor
-    @AllArgsConstructor
-    public static class Warning {
-
-        private String code;
-        private String details;
-        private String id;
-        private String message;
-        private String query;
-    }
-
     @lombok.Data
     @Builder
     @NoArgsConstructor