feat: add ListLayout

[mhk197]

Adds a layout that shreds apart List child arrays.

[codspeed-hq]

Merging this PR will not alter performance

⚠️ 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.

⚡ 1 improved benchmark
❌ 2 regressed benchmarks
✅ 1248 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	chunked_varbinview_opt_canonical_into[(1000, 10)]	187.5 µs	224.8 µs	-16.58%
⚡	WallTime	cuda/bitpacked_u8/unpack/3bw[100M]	353 µs	299.6 µs	+17.79%
❌	Simulation	new_alp_prim_test_between[f32, 16384]	103.7 µs	118.4 µs	-12.42%

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 mk/add-list-layout (d8a9ee5) with develop (495f30e)}