Merge pull request #730 from AjayBoddeda4/add-dataquanta-docs

docs: Add documentation to DataQuanta companion object

Author: zkaoudi

wayang-api/wayang-api-scala-java/src/main/scala/org/apache/wayang/api/DataQuanta.scala

@@ -1402,8 +1402,10 @@ class JoinedDataQuanta[Out0: ClassTag, Out1: ClassTag]
 }
 
 /**
- * TODO: add the documentation to the object org.apache.wayang.api.DataQuanta
- * labels: documentation,todo
+ * Companion object for [[DataQuanta]].
+ *
+ * Provides factory methods to create [[DataQuanta]] instances directly
+ * from [[OutputSlot]]s.
  */
 object DataQuanta {