feat: spacing attribute

[marc2332]

Closes #829

[github-actions]

Benchmark for 7674a22

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Test	Base	PR	%
benchmarks/alignments=true size=21845 depth=8 wide=4 mode=not cached	107.6±0.66ms	104.6±1.23ms	-2.79%
benchmarks/size=100001 depth=2 wide=100000 mode=not cached	25.2±1.08ms	25.9±1.44ms	+2.78%
benchmarks/size=10001 depth=2 wide=10000 mode=not cached	1471.8±160.36µs	1415.4±87.58µs	-3.83%
benchmarks/size=1001 depth=2 wide=1000 mode=not cached	136.1±1.88µs	135.9±1.35µs	-0.15%
benchmarks/size=131071 depth=17 wide=2 mode=not cached	24.6±1.07ms	25.1±1.03ms	+2.03%
benchmarks/size=16383 depth=14 wide=2 mode=not cached	1755.2±91.72µs	1766.2±140.28µs	+0.63%
benchmarks/size=19531 depth=7 wide=5 mode=cached	347.4±49.41µs	343.1±33.18µs	-1.24%
benchmarks/size=19531 depth=7 wide=5 mode=not cached	2.7±0.38ms	2.7±0.22ms	0.00%
benchmarks/size=4095 depth=12 wide=2 mode=not cached	411.0±58.07µs	413.9±79.92µs	+0.71%
benchmarks/size=54241 depth=5 wide=15 mode=cached	292.0±97.38µs	313.0±177.86µs	+7.19%
benchmarks/size=54241 depth=5 wide=15 mode=not cached	6.6±0.58ms	6.7±0.58ms	+1.52%

[github-actions]

Benchmark for 439bd3e

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Test	Base	PR	%
benchmarks/alignments=true size=21845 depth=8 wide=4 mode=not cached	97.4±0.63ms	95.1±1.46ms	-2.36%
benchmarks/size=100001 depth=2 wide=100000 mode=not cached	22.1±0.39ms	22.7±1.10ms	+2.71%
benchmarks/size=10001 depth=2 wide=10000 mode=not cached	1322.3±20.74µs	1309.3±34.55µs	-0.98%
benchmarks/size=1001 depth=2 wide=1000 mode=not cached	126.5±1.94µs	127.4±3.08µs	+0.71%
benchmarks/size=131071 depth=17 wide=2 mode=not cached	22.0±0.19ms	22.0±0.24ms	0.00%
benchmarks/size=16383 depth=14 wide=2 mode=not cached	1558.5±30.01µs	1558.6±28.97µs	+0.01%
benchmarks/size=19531 depth=7 wide=5 mode=cached	288.5±5.58µs	288.4±3.61µs	-0.03%
benchmarks/size=19531 depth=7 wide=5 mode=not cached	2.4±0.02ms	2.4±0.02ms	0.00%
benchmarks/size=4095 depth=12 wide=2 mode=not cached	385.7±133.47µs	380.2±90.63µs	-1.43%
benchmarks/size=54241 depth=5 wide=15 mode=cached	233.3±10.49µs	228.9±8.29µs	-1.89%
benchmarks/size=54241 depth=5 wide=15 mode=not cached	5.9±0.06ms	5.9±0.07ms	0.00%

[codecov]

Codecov Report

Attention: Patch coverage is 99.22481% with 1 line in your changes missing coverage. Please review.

Project coverage is 73.76%. Comparing base (f8a0844) to head (7263ecf).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/state/src/layout.rs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #834      +/-   ##
==========================================
+ Coverage   73.62%   73.76%   +0.13%     
==========================================
  Files         200      201       +1     
  Lines       21543    21661     +118     
==========================================
+ Hits        15862    15978     +116     
- Misses       5681     5683       +2     

☔ View full report in Codecov by Sentry.
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[github-actions]

Benchmark for 3dac6c0

Click to view benchmark

Test	Base	PR	%
benchmarks/alignments=true size=21845 depth=8 wide=4 mode=not cached	106.1±0.88ms	103.3±0.64ms	-2.64%
benchmarks/size=100001 depth=2 wide=100000 mode=not cached	26.3±0.94ms	25.8±1.33ms	-1.90%
benchmarks/size=10001 depth=2 wide=10000 mode=not cached	1465.6±17.77µs	1413.5±48.22µs	-3.55%
benchmarks/size=1001 depth=2 wide=1000 mode=not cached	141.4±5.60µs	136.0±1.12µs	-3.82%
benchmarks/size=131071 depth=17 wide=2 mode=not cached	24.1±0.58ms	24.7±0.64ms	+2.49%
benchmarks/size=16383 depth=14 wide=2 mode=not cached	1675.4±12.14µs	1781.3±15.73µs	+6.32%
benchmarks/size=19531 depth=7 wide=5 mode=cached	319.1±4.57µs	322.4±23.44µs	+1.03%
benchmarks/size=19531 depth=7 wide=5 mode=not cached	2.7±0.05ms	2.6±0.04ms	-3.70%
benchmarks/size=4095 depth=12 wide=2 mode=not cached	417.0±134.14µs	414.0±74.95µs	-0.72%
benchmarks/size=54241 depth=5 wide=15 mode=cached	291.6±47.01µs	268.6±49.36µs	-7.89%
benchmarks/size=54241 depth=5 wide=15 mode=not cached	6.4±0.06ms	6.5±0.21ms	+1.56%

[github-actions]

Benchmark for 9033e54

Click to view benchmark

Test	Base	PR	%
benchmarks/alignments=true size=21845 depth=8 wide=4 mode=not cached	102.2±0.91ms	102.1±0.15ms	-0.10%
benchmarks/size=100001 depth=2 wide=100000 mode=not cached	23.5±0.30ms	23.8±1.06ms	+1.28%
benchmarks/size=10001 depth=2 wide=10000 mode=not cached	1405.0±17.59µs	1405.5±30.65µs	+0.04%
benchmarks/size=1001 depth=2 wide=1000 mode=not cached	134.6±0.91µs	135.4±0.84µs	+0.59%
benchmarks/size=131071 depth=17 wide=2 mode=not cached	23.0±0.23ms	22.9±0.19ms	-0.43%
benchmarks/size=16383 depth=14 wide=2 mode=not cached	1692.3±69.38µs	1671.1±3.65µs	-1.25%
benchmarks/size=19531 depth=7 wide=5 mode=cached	310.4±1.29µs	309.7±3.12µs	-0.23%
benchmarks/size=19531 depth=7 wide=5 mode=not cached	2.6±0.16ms	2.6±0.01ms	0.00%
benchmarks/size=4095 depth=12 wide=2 mode=not cached	413.2±149.79µs	411.8±102.16µs	-0.34%
benchmarks/size=54241 depth=5 wide=15 mode=cached	248.8±106.38µs	254.7±163.04µs	+2.37%
benchmarks/size=54241 depth=5 wide=15 mode=not cached	6.3±0.03ms	6.7±0.16ms	+6.35%