feat(skills): add UIZZE anti-ui-slop

[samuelbushi]

What this adds

Adds the canonical UIZZE anti-ui-slop Skill as one source-backed content/skills/ entry.

The listing links the canonical GitHub source and live domain-backed Skill, uses the free local install path, describes the anti-ui-slop workflow and hard finish gate, and distinguishes the portable free Skill from optional authenticated UIZZE research, validation, audits, and rendered critique across 800,000+ real web and iOS screens.

Verification

• pnpm validate:content:strict passed: 1,389 content files validated.
• git diff --check passed.
• No generated registry artifacts or README files are included.

Source review was performed against:

• https://github.com/uizze/uizze/tree/main/skills/anti-ui-slop
• https://uizze.com/.well-known/agent-skills/anti-ui-slop/SKILL.md

[samuelbushi]

Current verification for the proposed listing:

• Canonical source: https://github.com/uizze/uizze
• Free install: npx skills add https://uizze.com --skill anti-ui-slop
• Free no-account preview: https://uizze.com/mcp/preview
• Full UIZZE distinction: live UI-reference search across 800,000+ real web and iOS screens, plus validation, audits, and rendered critique
• Current release: https://github.com/uizze/uizze/releases/tag/v1.2.11

The submitted entry is source-backed and the repository’s content, coverage, registry, and security checks are green.