feat: sync UIZZE anti-ui-slop skill

[samuelbushi]

Summary

Adds UIZZE as a maintained vendored skill source and syncs its anti-ui-slop skill into this collection.

The skill gives agents a product-specific UI quality gate: design contract, evidence-based reference selection, required states, interaction completeness, responsive checks, and a bounded finish pass. It complements the existing web-design-guidelines skill by covering product direction and generated-UI quality rather than duplicating implementation rules.

Changes

• add uizze/uizze as a vendor in meta.ts
• add the canonical repository as vendor/uizze
• sync anti-ui-slop with the repository’s generated SYNC.md and license handling
• document the skill in the vendored skills table

Validation

• corepack pnpm install --frozen-lockfile --ignore-scripts
• corepack pnpm start sync
• corepack pnpm lint
• git diff --check
• synced SKILL.md and OpenAI metadata match the canonical UIZZE source

The source is MIT-licensed and the sync points at the canonical https://github.com/uizze/uizze repository.

[samuelbushi]

Fresh verification after the catalogue sync: the canonical uizze/uizze Skill is now version 1.2.11, and the generated domain-backed copy at https://uizze.com/.well-known/agent-skills/anti-ui-slop/SKILL.md matches the GitHub source byte-for-byte. The catalogue-required Overview, Prerequisites, Output, Error Handling, and Resources sections are present in both copies.