allow plotly.js to accept numpy buffers

If we allowed all GL plot types to accept numpy buffers for plot x/y/z data, then the Python library could optionally avoid JSON serialization of array data, like @maartenbreddels does in his brillant project ipyvolume:

https://github.com/maartenbreddels/ipyvolume/blob/master/ipyvolume/serialize.py#L95

Here is the deserialization on the JS side:

https://github.com/maartenbreddels/ipyvolume/blob/master/js/src/serialize.js#L16

Plotly.js has all of these incredible WebGL figures for scientific computing, but their potential in Python, R, MATLAB, etc is limited by the JSON serialization step.

In a similar vein, it seems like all GL types should be able to accept Float32Array's directly instead of untyped JS arrays. Currently, it looks like only the Plotly trace type pointcloud accepts Float32Array's:

https://codepen.io/plotly/pen/GEoPgv

Inizia confrontando le implementazioni referenziate di ipyvolume serialize.py e js/src/serialize.js, quindi esamina la gestione esistente di Float32Array per pointcloud in Plotly.js e i punti di ingresso delle tracce GL. L’issue non indica file o test di Plotly.js; per considerarla completata sarebbe necessario concordare l’ambito delle tracce GL supportate, la deserializzazione dei buffer e verificare che i dati degli array evitino la serializzazione JSON.