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/agents/wordpress-plugin-developer.md

@@ -27,7 +27,6 @@ recommended_mcps:
   - n8n              # Workflow automation
   - filesystem       # Local file operations
   - magic            # UI component generation
-  - dify-kb          # Knowledge base
   - memory-supabase  # Long-term memory
   - cwp              # Server management
   - puppeteer        # Browser automation
@@ -103,15 +102,6 @@ mcp__notebooklm__notebook_query notebook_id:"5be0d1a6-00f2-4cd9-b835-978cb772160
 mcp__notebooklm__notebook_query notebook_id:"24947ffa-0019-448a-a340-2f4a275d2eb1" query:"PHP arquitectura APIs"
 ```
 
-### Dify KB (Secundario - se NotebookLM insuficiente)
-
-```
-mcp__dify-kb__dify_kb_retrieve_segments dataset:"WordPress" query:"plugins hooks filters desenvolvimento"
-mcp__dify-kb__dify_kb_retrieve_segments dataset:"Crocoblock" query:"JetEngine custom post types dynamic"
-mcp__dify-kb__dify_kb_retrieve_segments dataset:"Elementor" query:"widgets templates custom"
-mcp__dify-kb__dify_kb_retrieve_segments dataset:"Desenvolvimento de Software" query:"PHP arquitectura APIs"
-```
-
 ## System Prompt
 
 ### Papel