Activities API add activity type

[AlexAndBear]

To differentiate activities we need to have an activity type enum per activity,
the output could be e.G:

{
    "id": "2a1d46f4-bb24-432a-9aca-efd373cb00e2",
     **"type": "ITEM_RENAMED"**,
    "template": {
        "message": "{user} renamed {oldResource} to {resource}",
        "variables": {
            "folder": {
                "id": "b3c3a3e6-c1dc-48f0-b36f-fcfd2e78fe6c",
                "name": "Admin"
            },
            "oldResource": {
                "id": "",
                "name": "EEE.txt"
            },
            "resource": {
                "id": "a0b3f3e2-ff9a-4834-bf66-63119bc5eb22$b3c3a3e6-c1dc-48f0-b36f-fcfd2e78fe6c!743f8694-c785-4af9-8174-5acce3f3a543",
                "name": "aaa.txt"
            },
            "user": {
                "id": "b3c3a3e6-c1dc-48f0-b36f-fcfd2e78fe6c",
                "displayName": "admin"
            }
        }
    },
    "times": {
        "recordedTime": "2024-09-26T19:20:37.205994671Z"
    }
}