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>

gestao/skills/report/SKILL.md

@@ -1,17 +1,7 @@
 ---
 name: report
-description: >
-  Relatórios agregados v1.0 - Semanal, mensal, projecto. Compila dados de múltiplas skills.
-  Use when "report", "relatório", "semanal", "mensal", "resumo período".
-author: Descomplicar® Crescimento Digital
-version: 1.0.0
-quality_score: 75
-user_invocable: true
-category: business
-tags: [report, relatório, semanal, mensal, analytics, desk, crm]
-desk_project: 65
-allowed-tools: Read, mcp__desk-crm-v3, mcp__mcp-time
-mcps: desk-crm-v3, mcp-time
+description: Relatórios agregados semanal, mensal e por projecto. Compila dados de múltiplas fontes CRM. Usar quando "report", "relatório", "semanal", "mensal", "resumo período".
+context: fork
 ---
 
 # /report v1.0 - Relatórios Agregados