Blocks: Update hpq to 1.4.0 and drop the ts-expect-error suppressions

[manzoorwanijk]

What?

Updates hpq to 1.4.0 and drops the two @ts-expect-error suppressions on its imports.

Follow up to #81148 (comment).

Why?

hpq 1.4.0 ships TypeScript declarations, so the suppressions are no longer accurate.

How?

With the imports typed, the call sites in get-block-attributes.ts are checked for the first time and needed fixing, mostly Node where hpq's MatcherFn expects Element. Two casts are dropped as redundant; a non-null assertion and a MatcherObj cast are added where hpq's types are stricter than its runtime. Type-level only, no runtime changes.

Testing Instructions

1. npm run build succeeds.
2. npm run test:unit packages/blocks passes.
3. npm run lint:js passes.

Use of AI Tools

Authored with Claude Code. I have reviewed and take responsibility for the changes.

[github-actions]

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Co-authored-by: manzoorwanijk <manzoorwanijk@git.wordpress.org>
Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>
Co-authored-by: aduth <aduth@git.wordpress.org>

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[github-actions]

Size Change: +43 B (0%)

Total Size: 7.81 MB

📦 View Changed

Filename	Size	Change
build/scripts/blocks/index.min.js	45.4 kB	+43 B (+0.09%)

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[Mamaduka]

This looks good to me, but I'll defer to @aduth as lib author :)

[aduth]

LGTM 👍