Document Chrome Web Store listing draft

[iFurySt]

Summary

• add a Chrome Web Store listing/privacy draft for first Dashboard submission
• document current permission justifications based on the MV3 manifest
• update release docs to point at the listing draft and v0.1.3 asset

Validation

• git ls-files '*.md' docs/CHROME_WEB_STORE_LISTING.md | sort -u | xargs pnpm dlx markdownlint-cli2
• ./scripts/ci.sh
• git diff --check