feat: refactor 30+ skills to Anthropic progressive disclosure pattern

- All SKILL.md files now <500 lines (avg reduction 69%)
- Detailed content extracted to references/ subdirectories
- Frontmatter standardised: only name + description (Anthropic standard)
- New skills: brand-guidelines, spec-coauthor, report-templates, skill-creator
- Design skills: anti-slop guidelines, premium-proposals reference
- Removed non-standard frontmatter fields (triggers, version, author, category)

Plugins affected: infraestrutura, marketing, dev-tools, crm-ops, gestao,
core-tools, negocio, perfex-dev, wordpress, design-media

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

infraestrutura/skills/easypanel-validate/SKILL.md

@@ -1,16 +1,6 @@
 ---
 name: easypanel-validate
-description: Validate EasyPanel deployments and health checks via API oficial. Verifies services are
-  running correctly. Use when user mentions "easypanel validate", "verificar deploy",
-  "health check", "easypanel status", "deployment validation".
-author: Descomplicar® Crescimento Digital
-version: 2.0.0
-quality_score: 70
-user_invocable: true
-desk_task: TBD
-allowed-tools: Task
-dependencies:
-  - easypanel-api
+description: Validação pré-deploy de projectos EasyPanel com health checks, verificação de serviços e auto-fix opcional via API oficial.
 ---
 
 # EasyPanel Validate