Feature: support rectilinear chunk grid extension #3534

Performance Regression: -11.24%

❌ 2 regressed benchmarks
✅ 64 untouched benchmarks
⏩ 6 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

	Mode	Benchmark	`BASE`	`HEAD`	Efficiency
❌	WallTime	`test_sharded_morton_single_chunk[(32, 32, 32)-memory]`	1.9 ms	2.1 ms	-11.24%
❌	WallTime	`test_slice_indexing[(50, 50, 50)-(slice(None, None, None), slice(0, 3, 2), slice(0, 10, None))-memory]`	6.2 ms	6.9 ms	-10.01%

_{Comparing jhamman:feature/rectilinear-chunk-grid (91d8790) with main (fa61ed8)}

6 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. ↩