Add an optional quick-try link for Design Taste Frontend

The README positions Taste Skill around portable Agent Skills for layout, typography, motion, and spacing, and skills/taste-skill/SKILL.md has a very concrete “design read → dials → output” workflow.

One small docs idea: add an optional quick-try link for people who want to test the frontend design Skill in an OpenClaw/Hermes-style agent before installing it locally.

Try Design Taste Frontend from chat first

This would not replace the npx skills add instructions; it just gives users a lower-friction first run for a landing page or redesign prompt.