Create Use Cases for Get Notifications and Delete Notifications

[ChengShi-1]

Referring to native api

• Get All Notifications by User

{
    "status": "OK",
    "data": {
        "notifications": [
            {
                "id": 4,
                "type": "PUBLISHEDDS",
                "subjectText": "Root: Dataset \"Check Metadata\" has been published",
                "messageText": "Hello, \nYour dataset named Check Metadata (view at http://localhost:8080/dataset.xhtml?persistentId=doi:10.5072/FK2/K7BJYY ) was published in Root (view at http://localhost:8080/dataverse/root ).",
                "sentTimestamp": "2025-07-09T18:14:36Z"
            }
...
        ]
    }
}

• Delete Notification by User