✨ feat(mq-check): match patterns against markdown node kinds

[harehare]

Extend match type patterns so an arm like :h1 or :code matches a markdown value against a node-kind selector (same names as selectors, without the leading .), in addition to the existing type names (:string, :number, etc.). Attribute selectors (e.g. :lang) are rejected since they don't identify a node kind.

Also fix match guard/body evaluation to run against the matched value instead of the pipeline's ., so attribute selectors like .depth or .lang resolve correctly inside a guard or arm body without binding a variable first.

Close #1946

[codspeed-hq]

Merging this PR will not alter performance

✅ 31 untouched benchmarks

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_{Comparing feat/match-node-kind-patterns (1a2beeb) with main (61cd65b)¹}

Footnotes

1. No successful run was found on main (3ba33fa) during the generation of this report, so 61cd65b was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩