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-backup/SKILL.md

@@ -1,11 +1,7 @@
 ---
 name: cwp-backup
-description: CWP backup creation and management using official scripts. Creates user backups, manages backup locations. Based on official CWP documentation only. Use when user mentions "backup cwp", "restaurar cwp", "backup conta", "user backup".
-author: Descomplicar® Crescimento Digital
-version: 1.1.0
-quality_score: 72
-user_invocable: true
-desk_task: null
+description: Criação e gestão de backups no CWP com scripts oficiais — backups de utilizador, gestão de localizações e restauro.
+disable-model-invocation: true
 ---
 
 # /cwp-backup - Backups CWP (Documentação Oficial)