Stretch goal: integrate with other JS RDF tools


* see https://rdf.js.org/
* could also make a WASM build of @ericprud 's [SWObjects](https://github.com/ericprud/SWObjects) eg. see [slides](https://www.w3.org/2010/Talks/0218-SWObjects-egp/), or [Redland/Raptor](https://github.com/dajobe/librdf)