Changes to List notifications

added the new audience enum value to the notifications/items/scope response property for the response status 200

added the new loading enum value to the notifications/items/type response property for the response status 200

api path removed without deprecation

endpoint added

the response property nextCursor became nullable for the status 200

the response property notifications/items/actionLabel became nullable for the status 200

the response property notifications/items/actionUrl became nullable for the status 200

the response property notifications/items/authorImageUrl became nullable for the status 200

the response property notifications/items/authorName became nullable for the status 200

the response property notifications/items/authorRole became nullable for the status 200

the response property notifications/items/body became nullable for the status 200

the response property notifications/items/readAt became nullable for the status 200