vibespatial.io.arrow

Thin facade that re-exports the public API from the split io modules.

The original monolithic io_arrow module has been refactored into:

• io.wkb: WKB encoding/decoding, CUDA kernels, device encode helpers

• io.geoarrow: GeoArrow bridge, conversion, benchmarks

• io.geoparquet: GeoParquet scanning, reading, writing

• io.pylibcudf: pylibcudf integration layer for GPU-accelerated decoding

This file preserves backwards compatibility so that from vibespatial.io.arrow import X continues to work.