Allow users to store their notification preferences

[kobergj]

Extend user settings so that a user can store their notifications preferences like https://github.com/owncloud/enterprise/issues/6715

New settings:

• List of available events. Needs "name", "description" (translated) "avaibleInApp", "availableInMail" (bool) and "sendInApp", "sendInMail" (bool) fields (names tbd)
• Mail cycles replaces disable_email setting (can be "never", "instant", "weekly", "daily")

[2403905]

Extend user settings so that a user can store their notifications preferences like >https://github.com/owncloud/enterprise/issues/6715

New settings:

List of available events. Needs "name", "description" (translated) "avaibleInApp", "availableInMail" (bool) and >"sendInApp", "sendInMail" (bool) fields (names tbd)
Mail cycles replaces disable_email setting (can be "never", "instant", "weekly", "daily")

@kobergj We should discuss the requirements because they do not match Acceptance Criteria from the https://github.com/owncloud/enterprise/issues/6715

[2403905]

The values-save reqest

curl -XPOST --location 'https://localhost:9200/api/v0/settings/values-save'  -vk -uadmin:admin \
--header 'Content-Type: application/json' \
--data '{
    "value": {
        "id": "4e454222-4880-4899-8418-315f8aa284d1",
        "accountUuid": "me",
        "bundleId": "2a506de7-99bd-4f0d-994e-c38e72c28fd9",
        "settingId": "872d8ef6-6f2a-42ab-af7d-f53cc81d7046",
        "resource": {
            "type": "TYPE_USER"
        },
        "collectionValue": {
            "values": [
                {
                    "key": "in-app",
                    "boolValue": false
                },
                {
                    "key": "mail",
                    "boolValue": false
                }
            ]
        }
    }
}'