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/mindmap/SKILL.md

@@ -1,19 +1,7 @@
 ---
 name: mindmap
-title: Mindmap Generator (DesktopNaotu)
-description: Gera ficheiros .km (mindmap) compativeis com DesktopNaotu/Kityminder. Cria mindmaps a partir de topicos, planos, brainstorms ou qualquer estrutura hierarquica.
-author: Descomplicar
-version: 1.0.0
-tags: [mindmap, naotu, kityminder, brainstorm, planeamento, organizacao]
-user_invocable: true
-trigger_patterns:
-  - "mindmap"
-  - "mapa mental"
-  - "mind map"
-  - "naotu"
-  - "criar mindmap"
-  - "gerar mindmap"
-  - "brainstorm visual"
+description: Gera ficheiros .km (mindmap) compatíveis com DesktopNaotu/Kityminder. Cria mindmaps a partir de tópicos, planos, brainstorms ou qualquer estrutura hierárquica. Usar quando "mindmap", "mapa mental", "naotu", "criar mindmap", "brainstorm visual".
+disable-model-invocation: true
 ---
 
 # Mindmap Generator - DesktopNaotu