feat(vortex-spatial): add area scalar function

[HarukiMoriarty]

Summary

• add a native GeoArea scalar function backed by geo::Area::unsigned_area
• support every native geometry dtype, including zero-area point and line families and rectangular boxes
• preserve input nullability and propagate null rows through unary columnar execution
• give every geo scalar function a local operand validator that checks exact arity before dtype validation
• parameterize repeated Area, Envelope, and MakeLine cases with rstest for clearer per-dtype failures and broader operand-order coverage

Semantics

This follows DuckDB ST_Area semantics over the native Vortex geometry types: point and line families return zero, polygon holes are subtracted, multipolygon component areas are summed, rectangles use width times height, and higher coordinate dimensions are ignored. WKB remains excluded because it is a storage representation rather than a native decoded geometry.

[codspeed-hq]

Merging this PR will improve performance by 84.01%

⚡ 1 improved benchmark
✅ 1936 untouched benchmarks
🆕 7 new benchmarks
⏩ 85 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	decompress[u64, (1000, 16)]	133.5 µs	72.6 µs	+84.01%
🆕	Simulation	column_x_column	N/A	213.3 µs	N/A
🆕	Simulation	column_x_constant	N/A	583.7 µs	N/A
🆕	Simulation	nullable_columns	N/A	236.1 µs	N/A
🆕	Simulation	multipolygon	N/A	2.7 ms	N/A
🆕	Simulation	nullable_polygon	N/A	1.4 ms	N/A
🆕	Simulation	polygon_with_holes	N/A	2.3 ms	N/A
🆕	Simulation	simple_polygon	N/A	1 ms	N/A

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing nemo/geo-area (2980eb4) with nemo/geo-native-bbox-precheck (1698f91)}

Footnotes

1. 85 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[connortsui20]

I really need to get my rowfn stuff in