Improve decompression speed for escape-heavy strings

[AdamGS]

Benchmarks are in #171

[codspeed-hq]

Merging this PR will degrade performance by 50%

⚠️ 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.

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 5 improved benchmarks
❌ 4 regressed benchmarks
✅ 31 untouched benchmarks

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

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	WallTime	decompress-into-reuse-all-escape	2 ms	1.4 ms	+39.77%
⚡	WallTime	decompress-into-reuse	16 ns	13 ns	+23.08%
❌	WallTime	compress	5.4 ms	7.1 ms	-24.62%
❌	WallTime	decompress	765.2 µs	897.2 µs	-14.7%
⚡	WallTime	compress	3.1 ms	2.7 ms	+13.8%
⚡	WallTime	decompress-into-reuse	12 ns	8 ns	+50%
❌	WallTime	compress-twobytes	1 ns	2 ns	-50%
⚡	Simulation	decompress-into-reuse-all-escape	10.2 ms	6.7 ms	+52.35%
❌	Simulation	decompress-into-reuse	633.3 ns	840.3 ns	-24.63%

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_{Comparing adamg/escape-heavy-decompression (cbdf004) with develop (5091107)}