Add option to add hidden layers

[IagoLast]

They request an option to add hidden layers.

currently the only way is the following:

const layer = new carto.layer.Layer(source, style);
layer.hide();
client.addLayer(layer);

Maybe we could add an option like this:

const layer = new carto.layer.Layer(source, style, {visible: false});
client.addLayer(layer);

cc @alonsogarciapablo

[rubenmoya]

Added in version 4.0.17