feat: define signal type for notifications

Signed-off-by: Heikki Hellgren <heikki.hellgren@op.fi>

plugins/notifications-common/api-report.md

@@ -3,6 +3,12 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
+// @public (undocumented)
+export type NewNotificationSignal = {
+  action: 'new_notification';
+  notification_id: string;
+};
+
 // @public (undocumented)
 type Notification_2 = {
   id: string;
@@ -28,9 +34,18 @@ export type NotificationPayload = {
   icon?: string;
 };
 
+// @public (undocumented)
+export type NotificationReadSignal = {
+  action: 'notification_read' | 'notification_unread';
+  notification_ids: string[];
+};
+
 // @public (undocumented)
 export type NotificationSeverity = 'critical' | 'high' | 'normal' | 'low';
 
+// @public (undocumented)
+export type NotificationSignal = NewNotificationSignal | NotificationReadSignal;
+
 // @public (undocumented)
 export type NotificationStatus = {
   unread: number;

plugins/notifications-common/src/types.ts

@@ -51,3 +51,18 @@ export type NotificationStatus = {
   unread: number;
   read: number;
 };
+
+/** @public */
+export type NewNotificationSignal = {
+  action: 'new_notification';
+  notification_id: string;
+};
+
+/** @public */
+export type NotificationReadSignal = {
+  action: 'notification_read' | 'notification_unread';
+  notification_ids: string[];
+};
+
+/** @public */
+export type NotificationSignal = NewNotificationSignal | NotificationReadSignal;