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>

wordpress/skills/wp-cli/SKILL.md

@@ -1,16 +1,6 @@
 ---
 name: wp-cli
-description: This skill should be used when the user asks to "wp-cli cwp", "gerir
-  wordpress linha de comandos", "actualizar plugins wp-cli", "backup wordpress cli",
-  "migrar site wordpress", "search replace wordpress", "criar utilizador wordpress cli",
-  "wp-cli no servidor", "wp-cli allow-root", "comandos wordpress server",
-  "actualizar wordpress servidor", "modo manutencao wordpress", "wp db export",
-  "wp plugin update server", "wp core update cwp". WP-CLI management on CWP server
-  (server.descomplicar.pt) with multi-PHP support.
-author: Descomplicar® Crescimento Digital
-version: 1.0.0
-quality_score: 80
-user_invocable: true
+description: Gestão WordPress via WP-CLI no servidor CWP. Cobre core, plugins, temas, base de dados, utilizadores, migração, search-replace e automação com suporte multi-PHP.
 ---
 
 # /wp-cli - Gestão WordPress via WP-CLI no CWP