chore(release): prepare 2.3.3

[XXPermanentXX]

Summary

Prepare the 2.3.3 release for the fixes already merged in #266 and #269.

• Bump the five published CLI packages from 2.3.2 to 2.3.3 and synchronize all seven bundled Skill versions.
• Add matching English and Chinese release notes for binary model API request compatibility, request timeouts and streaming cleanup, Windows console login URLs, and missing model API key guidance.
• Restore the original demo cover in the Chinese README, reverting an accidental image URL change and keeping the root and packaged READMEs consistent.

Validation

• pnpm run sync:skill-assets
• vp check: 0 errors; 3 existing warnings.
• Channel dry-run: node tools/release/publish-channel.mjs --channel test --knowledge --dry-run.
• Stable dry-run: CI=true node tools/release/publish-stable.mjs --knowledge --dry-run (temporary Git index for generated-asset validation).
• Full suite, pnpm test --maxWorkers=4: 2,939 passed and 205 skipped; one suite setup failure occurred while signing a compiled probe with the local default Bun 1.3.12.
• Re-ran that suite with the CI/release-pinned Bun 1.3.14: all 22 tests passed.
• Verified all package and Skill versions are 2.3.3, no temporary beta versions remain, README synchronization passes, and git diff --check passes.

This PR prepares release metadata and documentation. Publishing remains a separate step.