Add support for RunShutdownable to actorSet

actorset.go

@@ -16,6 +16,7 @@ type actorSets struct {
 	configurable    actorSet[Configurable]
 	initializable   actorSet[Initializable]
 	runnable        actorSet[Runnable]
+	runShutdownable actorSet[RunShutdownable]
 	trimmable       actorSet[Trimmable]
 }
 
@@ -52,6 +53,7 @@ func (sets *actorSets) All() iter.Seq[actorSetIface] {
 		yield(&sets.configurable)
 		yield(&sets.initializable)
 		yield(&sets.runnable)
+		yield(&sets.runShutdownable)
 		yield(&sets.trimmable)
 	}
 }