[JS] Read Parquet files in JavaScript

See question in https://github.com/apache/arrow/issues/2209

**Reporter**: [Wes McKinney](https://issues.apache.org/jira/browse/ARROW-2786) / @wesm

_{**Note**: *This issue was originally created as [ARROW-2786](https://issues.apache.org/jira/browse/ARROW-2786). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}