Create ex02-01-parseq.worksheet.sc

src/main/scala/ex02-01-parseq.worksheet.sc

+import scala.collection.parallel.immutable.ParVector
+import collection.parallel.CollectionConverters.*
+import collection.parallel.{ParSeq, ParSet}
+
+
+val l = List(1,2,3)
+val l2: ParSeq[Int] = l.par
+
+// Calling toSet on a ParSeq returns ParSet:
+val l3: ParSet[Int] = l2.toSet