Changes to List all comments

added the enum value metadata to the property items/ of the query request parameter fields

added the optional property items/metadata to the response with the 200 status

the response's body type changed from no type to array for status 200

the response's body type changed from array to no type for status 200

added the new optional query request parameter parent_id

added the enum value has_children to the property items/ of the query request parameter fields

added the enum value parent_id to the property items/ of the query request parameter fields

added the optional property items/has_children to the response with the 200 status

added the optional property items/parent_id to the response with the 200 status