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/cwp-email/SKILL.md

@@ -1,11 +1,7 @@
 ---
 name: cwp-email
-description: CWP email management including DKIM, SPF, mail queue. Based on official CWP documentation only. Use when user mentions "email cwp", "dkim", "spf", "mail queue", "postfix cwp".
-author: Descomplicar® Crescimento Digital
-version: 1.1.0
-quality_score: 72
-user_invocable: true
-desk_task: null
+description: Gestão de email no CWP — configuração de DKIM, SPF, mail queue e Postfix baseada na documentação oficial.
+disable-model-invocation: true
 ---
 
 # /cwp-email - Email CWP (Documentação Oficial)