feat(rust): [WIP] raw IPC handler

[c-peters]

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #15650 will not alter performance

_{Comparing c-peters:flight_reader (aca8bed) with main (99ab9c0)}

Summary

✅ 21 untouched benchmarks

[alexander-beedie]

Nice! We have some homegrown Polars/Flight interactions at work - once there's something to test, let me know and I can give it a go here to see how it behaves "in the wild" ;)

[ritchie46]

superseded by #19239