chore(release): prepare 1.27.0

[XXPermanentXX]

Summary

• bump the five lockstep packages and first-party Skill metadata to 1.27.0
• add synchronized English and Chinese release notes for the merged 1.27.0 changes

Verification

• vp check (0 errors; 3 existing warnings)
• CI=true node tools/release/publish-channel.mjs --channel test --knowledge --dry-run
• CI=true node tools/release/publish-stable.mjs --knowledge --dry-run
• git diff --check origin/main...HEAD

This PR prepares the release only; it does not publish packages, create a tag, or create a GitHub Release.