Changes to List shareable assets

added the new player enum value to the data/items/link_preview response property for the response status 200

added the required property data/items/link_preview to the response with the 200 status

added the new optional query request parameter visibility

added the optional property data/items/visibility to the response with the 200 status

for the query request parameter limit, default value 50 was removed

for the query request parameter offset, default value 0 was removed

added the optional property data/items/stream_url to the response with the 200 status

endpoint added