docs(list): document responsive filter controls and column groups

[markdumay]

Summary

Documents the three table arguments the list block forwards but never covered: filter_responsive, wrap and wrap_cols.

wrap was not mentioned in list.md at all, so a block author had no way to discover that a list can fold on small screens rather than run off the side of one. The shortcode-level docs on the Table component page cover the same features, but nothing pointed a block author at the snake_case equivalents.

What's added

• Category Filter — a paragraph on filter_responsive: what it swaps, that the two controls stay in step across the breakpoint, and that it defaults to false.
• Responsive Tables (new section) — wrap for the common one-wide-column case, and wrap_cols for folding a record into groups, with a live example. Covers the rule the counts must satisfy, the fallback when a list no longer sums (one left stale by a column being added), and that folded columns hide their headings — which is what makes the grouping a decision rather than a default.

The example uses the existing table-filter-hook, which renders three columns, so "1,2" is a valid split against a hook the page already documents.

Host requirement

Important

These examples need mod-blocks v2.6.0 in the consuming site. The block examples render live, so a host on an older mod-blocks does not merely fail to fold — it fails the build:

ERROR partial [component-library/components/list/list.hugo.html] - Invalid arguments: docs/blocks/list.md

Verified both ways: hinode's example site on mod-blocks v2.4.0 errors as above; on v2.6.0 the page builds and the example emits data-table-wrap-cols=1,2.

gethinode.com mounts this module too and will need the same floor.

Testing

Built through hinode's example site with this branch mounted in place of the released module. Both sections render, and the wrap_cols example produces a genuinely folded table rather than only documenting one.

markdownlint-cli2 reports 0 issues on the changed file.

Note on existing lint failures

pnpm lint fails on content/blocks/preview.md, content/blocks/testimonials.md and content/components/testimonial.md (MD060, MD012, MD009). Pre-existing on main and untouched here — content/blocks/list.md is the only changed file and lints clean.

[markdumay]

🎉 This PR is included in version 1.15.9 🎉

The release is available on GitHub release

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