Add ClawHub install CTA + 30-Second Preview block to dataset card

Update README: hook + template description structure

Update README with dataset card, Twitter link, and cross-platform CTA

chore: add YAML metadata frontmatter for HF dataset SEO

i18n: Add full Chinese, Japanese, Korean README translations

Add internal linking to related skills

Initial release: gingiris-kol-outreach v1.0.0

initial commit