add notification repositories

src/main/java/com/ali/notificationsvc/repositories/INotificationRepository.java

+package com.ali.notificationsvc.repositories;
+
+import com.ali.notificationsvc.models.Notification;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface INotificationRepository extends JpaRepository<Notification, Integer> {
+}