layer1: add managed watcher config

pkg/utils/namespace_manager_model.go

@@ -81,6 +81,13 @@ type NamespaceManagerSummary struct {
 	Subscribers     []string
 }
 
+type ManagedNamespaceWatcherConfig struct {
+	Component       string
+	Namespaces      []string
+	RemovalStrategy NamespaceRemovalStrategy
+	Subscriber      NamespaceSubscriber
+}
+
 func NewNamespaceEvent(eventType NamespaceEventType, name string, labels map[string]string, source NamespaceSource, observedAt time.Time) NamespaceEvent {
 	return NamespaceEvent{
 		Type:       eventType,