[Feat]getPickingInfo don't support async call

[zairl23]

Target Use Case

When click a Tile3D layer, i want how the building info in a popup ui component by calling loadFeatureAttributes(info.object, info.index) which is a async function , but getPickingInfo of layer don't suppport async call

Proposal

Layer's getPickingInfo support async call.

[Pessimistress]

getPickingInfo needs to be synchronous so that onHover/onClick etc are called promptly. If you need to perform some async action you can do so in your own app, something like

getPickingInfo({info}) {
  info.getFeatureAttributes = async () => {
    // wrap the async operation with internal information
  };
}

And in your application

onClick: async (info) => {
  const attributes = await info.getFeatureAttributes();
  ...
}

[zairl23]

@Pessimistress thank you