feat(vortex-geo): Arrow import/export for the native Point type

[HarukiMoriarty]

Summary

This PR adds support for import/export to Arrow for the Point extension type, as the
geoarrow.point Arrow extension with separated (struct) coordinates.

Stacked on #8372.

Testing

Unit tests are added to exercise both code paths, plus a Vortex → Arrow → Vortex round-trip.

[codspeed-hq]

Merging this PR will improve performance by 13.08%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 5 improved benchmarks
❌ 2 regressed benchmarks
✅ 1525 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	bitwise_not_vortex_buffer_mut[128]	215.3 ns	244.4 ns	-11.93%
❌	Simulation	chunked_varbinview_canonical_into[(100, 100)]	273.3 µs	309.3 µs	-11.65%
⚡	Simulation	take_10k_random	254.5 µs	196.8 µs	+29.34%
⚡	Simulation	patched_take_10k_contiguous_patches	289.2 µs	230.5 µs	+25.49%
⚡	Simulation	patched_take_10k_random	301.2 µs	242.4 µs	+24.23%
⚡	Simulation	take_10k_contiguous	310.5 µs	251.9 µs	+23.25%
⚡	Simulation	chunked_varbinview_canonical_into[(1000, 10)]	197.9 µs	161.8 µs	+22.28%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing nemo/geo-point-arrow (638d514) with nemo/geo-point (491f49f)}