feat: Add UseEditable::new_in_hook for manual creation of editable content

[marc2332]

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Benchmark for 85a6509

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Test	Base	PR	%
benchmarks/alignments=true size=21845 depth=8 wide=4 mode=not cached	103.0±0.47ms	103.0±0.44ms	0.00%
benchmarks/size=100001 depth=2 wide=100000 mode=not cached	23.7±0.90ms	28.0±1.38ms	+18.14%
benchmarks/size=10001 depth=2 wide=10000 mode=not cached	1365.9±11.57µs	1378.7±12.41µs	+0.94%
benchmarks/size=1001 depth=2 wide=1000 mode=not cached	132.0±1.86µs	133.8±2.22µs	+1.36%
benchmarks/size=131071 depth=17 wide=2 mode=not cached	24.2±0.69ms	27.2±0.59ms	+12.40%
benchmarks/size=16383 depth=14 wide=2 mode=not cached	1685.9±10.61µs	1912.9±162.77µs	+13.46%
benchmarks/size=19531 depth=7 wide=5 mode=cached	320.0±9.65µs	316.0±1.87µs	-1.25%
benchmarks/size=19531 depth=7 wide=5 mode=not cached	2.5±0.05ms	2.6±0.02ms	+4.00%
benchmarks/size=4095 depth=12 wide=2 mode=not cached	410.8±60.32µs	412.9±56.26µs	+0.51%
benchmarks/size=54241 depth=5 wide=15 mode=cached	252.8±12.50µs	249.2±8.10µs	-1.42%
benchmarks/size=54241 depth=5 wide=15 mode=not cached	6.2±0.31ms	6.8±0.61ms	+9.68%