Server-based aggregations

[sweco-semtne]

Would it be feasible to implement something similar or integrate with VegaFusion.
It is a serverside accelerator for large datasets visualized with Vega

https://github.com/vegafusion/vegafusion/

[josevalim]

I have started a discussion on VegaFusion about this: vega/vegafusion#499

We would need two things:

1. To support a to_vega conversion on VegaLite through vl-convert, something that can also happen with the png/svg generation: Consider using vl-convert executables for export instead of npm vega_lite#80

2. Add bindings to VegaFusion and a mechanism to export Polars to Arrow IPC (ideally zero copy)