feat(integrations): add mock integration (#3505)

packages/integrations/src/mock/data/notifications.ts

@@ -0,0 +1,19 @@
+import type { Notification } from "../../interfaces/notifications/notification-types";
+import type { INotificationsIntegration } from "../../interfaces/notifications/notifications-integration";
+
+export class NotificationsMockService implements INotificationsIntegration {
+  public async getNotificationsAsync(): Promise<Notification[]> {
+    return await Promise.resolve(
+      Array.from({ length: 10 }, (_, index) => NotificationsMockService.createNotification(index)),
+    );
+  }
+
+  private static createNotification(index: number): Notification {
+    return {
+      id: index.toString(),
+      time: new Date(Date.now() - Math.random() * 1000000), // Random time within the next 11 days
+      title: `Notification ${index}`,
+      body: `This is the body of notification ${index}.`,
+    };
+  }
+}