feat(preact): add Preact components

[dangreen]

Adds @srcset/preact - Preact components for responsive images.

• Picture - <picture> with a <source> per format group ordered by efficiency, and a sizes prop applied to every source
• Image - <img> with intrinsic size, lazy loading and async decoding by default, blur-up placeholder (once per mount), imgRef to reach the element (plain Preact does not forward ref to function components), camelCase-only fetchPriority, Preact 10.23+ ref cleanup support
• Style prop typed with Preact's own CSSProperties for full autocomplete
• Reviewed locally in three Codex passes (final pass: no findings)

🤖 Generated with Claude Code

[coveralls]

Coverage Report for CI Build 31195663881

Coverage increased (+0.5%) to 90.268%

Details

• Coverage increased (+0.5%) from the base build.
• Patch coverage: 23 of 23 lines across 2 files are fully covered (100%).
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	586
Covered Lines:	543
Line Coverage:	92.66%
Relevant Branches:	421
Covered Branches:	366
Branch Coverage:	86.94%
Branches in Coverage %:	Yes
Coverage Strength:	89053.04 hits per line

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💛 - Coveralls