Add resource type Case for forward compability.

Author: gunnarvelle

common/src/main/scala/no/ndla/common/model/domain/ResourceType.scala

@@ -29,6 +29,7 @@ object ResourceType extends Enum[ResourceType] with CirceEnum[ResourceType] {
   case object Image             extends ResourceType("image")
   case object Learningpath      extends ResourceType("learningpath")
   case object Multidisciplinary extends ResourceType("multidisciplinary")
+  case object Case              extends ResourceType("case")
   case object Topic             extends ResourceType("topic")
   case object Video             extends ResourceType("video")
 }

myndla-api/src/main/scala/no/ndla/myndlaapi/controller/StatsController.scala

@@ -45,7 +45,7 @@ class StatsController(using
     }
 
   private val pathResourceType = path[CommaSeparated[String]]("resourceType").description(
-    s"The type of the resource to look up. Comma separated list to support ${ResourceType.Multidisciplinary}. Possible values ${ResourceType.values.mkString(", ")}"
+    s"The type of the resource to look up. Separate with comma to search for several types simultaneously. Possible values ${ResourceType.values.mkString(", ")}"
   )
   private val pathResourceIds =
     path[CommaSeparated[String]]("resourceIds").description("IDs of the resources to look up")