[WIP] grid tables.

[kivikakk]

Just starting to look at a solve for #531.

[codspeed-hq]

Merging this PR will not alter performance

✅ 1 untouched benchmark

---

_{Comparing push-soqmstwoyyqt (78fd699) with main (a905937)}

[github-actions]

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
./bench.sh ./comrak-c4bb56f	99.0 ± 1.5	96.7	103.7	2.06 ± 0.04
./bench.sh ./comrak-main	98.5 ± 1.9	95.4	102.5	2.05 ± 0.05
./bench.sh ./pulldown-cmark	48.0 ± 0.7	47.1	50.4	1.00
./bench.sh ./cmark-gfm	76.1 ± 5.0	71.6	89.8	1.59 ± 0.11
./bench.sh ./markdown-it	237.8 ± 2.7	232.1	242.6	4.95 ± 0.09

Run on Wed Jul 8 11:14:52 UTC 2026