docs: add a real-run demo, concise bilingual READMEs, and a brand kit

[reacher-z]

What does this PR do?

The README's long setup instructions, historical tables, FAQ, and community material make it hard to see what a ClawBench run produces. Give both languages a short landing page built around the benchmark's purpose, an actual recorded task, scoring evidence, and a minimal install/run path. Move the detailed material into paired English/Chinese guides with working links and preserved historical table values.

Add a 15.5-second demo from the published Claude Opus 4.7 / Hermes Khan Academy trace: choose an answer, capture the attemptProblem request, and show the saved judge's match: true. The GIF is about 167 KiB, with a pauseable MP4 and a reduced-motion poster. Its companion pages link the original recording, actions, interception, and judge files at a pinned dataset revision, record SHA-256 hashes, and explain every crop, speed change, and evidence annotation. The builder checks those hashes and displayed fields before rendering.

Add an original SVG identity with light/dark and monochrome/reversed variants, a small favicon in SVG/PNG/ICO, and a 1200 × 630 social card. Include editable sources, generators, font attribution, usage guidance, and CI checks for generated workflow/brand assets and stale raster exports. Update the changelog.

Preview

English README · 中文 README · Demo evidence · Brand kit

Corpus

• v2
• v1
• both
• not applicable — documentation and presentation assets; task definitions and runtime scoring are unchanged.

Test plan

• Verified the four demo source hashes and the request/verdict fields against the pinned published trace; reviewed the browser excerpt and all evidence panels.
• Decoded the GIF/MP4, checked duration and dimensions, and verified the ICO's 16/32/48/64 px representations and 1200 × 630 social export.
• Rendered GitHub Markdown output at desktop and mobile widths in both languages and themes; checked reduced-motion fallback, workflow switching, horizontal overflow, and Quickstart navigation.
• python3 scripts/ci/check_markdown_links.py — 281 local links resolve; separate fragment audit passes.
• Historical result table rows match the previous README exactly.
• Both asset generators pass --check; new Python helpers pass Ruff check and format check.
• git diff --check.

Related issues

N/A

[reacher-z]

@Perry2004 Please review this PR.

[Perry2004]

Please resolve the merge conflict with main.