Example of how read positions in the frontend

Hello, thanks for your amazing work on graphs.
I'm using ngraph.offline.layout on a server to precompute the positions, however, I have trouble figuring out how to decode the binary data in the frontend.
Should I use [dataview](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView/getInt32) ?

Could you add a little example in readme ?
thanks

Start with the README and the ngraph.offline.layout output format to understand how precomputed positions are stored. Add a small frontend example showing how to decode the binary data, including whether DataView is appropriate; done means a reader can reproduce the position lookup from the README alone.

Written by the indexing model from the issue text.