chore(lib-dynamodb): re-export options and NativeAttribute* types (#5982)

Author: trivikr

lib/lib-dynamodb/src/index.ts

@@ -5,3 +5,5 @@ export * from "./DynamoDBDocumentClient";
 export * from "./commands";
 export * from "./pagination";
 export { NumberValueImpl as NumberValue } from "@aws-sdk/util-dynamodb";
+export { marshallOptions, unmarshallOptions } from "@aws-sdk/util-dynamodb";
+export { NativeAttributeValue, NativeAttributeBinary, NativeScalarAttributeValue } from "@aws-sdk/util-dynamodb";