all_options fuzzes *across* all options.

[kivikakk]

Use the prior art in the quadratic fuzzer; this should (with a fair bit of time) find all the delightful combinations we haven't looked into before.

[github-actions]

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
./bench.sh ./comrak-2be3549	106.4 ± 1.0	105.0	108.8	1.82 ± 0.03
./bench.sh ./comrak-main	106.4 ± 1.3	104.4	109.1	1.82 ± 0.03
./bench.sh ./pulldown-cmark	58.6 ± 0.7	57.9	61.1	1.00
./bench.sh ./cmark-gfm	93.6 ± 6.2	83.1	104.9	1.60 ± 0.11
./bench.sh ./markdown-it	263.4 ± 3.2	256.4	269.1	4.50 ± 0.08

Run on Sat Nov 1 06:40:26 UTC 2025