feat: visible_width & visible_height

[marc2332]

Closes #1018

[github-actions]

Benchmark for a8b23f7

Click to view benchmark

Test	Base	PR	%
benchmarks/alignments=true size=21845 depth=8 wide=4 mode=not cached	111.9±0.84ms	112.9±0.90ms	+0.89%
benchmarks/size=100001 depth=2 wide=100000 mode=not cached	28.5±0.76ms	29.4±1.55ms	+3.16%
benchmarks/size=10001 depth=2 wide=10000 mode=not cached	1437.5±43.10µs	1460.4±209.32µs	+1.59%
benchmarks/size=1001 depth=2 wide=1000 mode=not cached	137.9±2.30µs	137.3±3.51µs	-0.44%
benchmarks/size=131071 depth=17 wide=2 mode=not cached	27.8±1.58ms	28.3±1.03ms	+1.80%
benchmarks/size=16383 depth=14 wide=2 mode=not cached	1819.1±55.56µs	1931.4±75.61µs	+6.17%
benchmarks/size=19531 depth=7 wide=5 mode=cached	454.9±39.77µs	365.1±44.92µs	-19.74%
benchmarks/size=19531 depth=7 wide=5 mode=not cached	2.9±0.15ms	2.7±0.07ms	-6.90%
benchmarks/size=4095 depth=12 wide=2 mode=not cached	414.6±48.12µs	424.2±61.19µs	+2.32%
benchmarks/size=54241 depth=5 wide=15 mode=cached	427.4±49.65µs	305.6±18.09µs	-28.50%
benchmarks/size=54241 depth=5 wide=15 mode=not cached	7.5±0.48ms	7.2±0.42ms	-4.00%

[codecov]

Codecov Report

Attention: Patch coverage is 61.42857% with 27 lines in your changes missing coverage. Please review.

Project coverage is 73.46%. Comparing base (d6f4b65) to head (a33a116).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/devtools/src/tabs/style.rs	0.00%	9 Missing ⚠️
crates/core/src/node.rs	0.00%	8 Missing ⚠️
crates/torin/src/values/visible_size.rs	37.50%	5 Missing ⚠️
crates/state/src/layout.rs	33.33%	4 Missing ⚠️
crates/state/src/values/visible_size.rs	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1072      +/-   ##
==========================================
- Coverage   73.50%   73.46%   -0.04%     
==========================================
  Files         221      223       +2     
  Lines       27333    27382      +49     
==========================================
+ Hits        20091    20117      +26     
- Misses       7242     7265      +23     

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