Generic GeoArrowLayer that handles any GeoArrow input type, including WKB, geoarrow.geometry

[kylebarron]

It would be great handle arbitrary GeoArrow input in deck.gl-layers, including serialized GeoArrow geometry types (geoarrow.wkb and, less important, geoarrow.wkt) and the GeoArrow union type geoarrow.geometry.

If we add support in https://github.com/geoarrow/geoarrow-js for parsing these generic types and converting them to single-geometry-type types where possible, then we can simplify our work here. All the logic for doing so has already been implemented in https://github.com/geoarrow/geoarrow-rs; we "just" need to convert the logic from Rust to TypeScript.

Then we can have a GeoArrowLayer in deck.gl-layers here that acts similarly to the upstream GeoJsonLayer, which defers to underlying layer types based on the input. At least to start, we wouldn't support multiple layer types in a single table, because it's hard to slice and rebuild Arrow tables in JS.

[kylebarron]

See also geoarrow/geoarrow-rs#1407, as Wasm might be a lighter lift for now to get things working