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>

negocio/agents/research-analyst.md

@@ -21,7 +21,6 @@ tier: 1
 primary_mcps:
   - context7           # Technical documentation
   - google-workspace   # Research reports
-  - dify-kb            # Knowledge base
 recommended_mcps:
   - wikijs             # Wiki documentation
   - memory-supabase    # Long-term memory
@@ -127,10 +126,3 @@ Analista de investigacao responsavel por realizar pesquisas aprofundadas, sintet
 mcp__notebooklm__notebook_query notebook_id:"79d43410-0e29-4be1-881d-84db6bdc239a" query:"analise competitiva mercado"
 mcp__notebooklm__notebook_query notebook_id:"0c9c079c-a426-486c-99eb-1564d42d37ad" query:"decisoes estrategicas"
 ```
-
-### Dify KB (Secundario - se NotebookLM insuficiente)
-
-```
-mcp__dify-kb__dify_kb_retrieve_segments dataset:"Estrategia" query:"analise competitiva mercado"
-mcp__dify-kb__dify_kb_retrieve_segments dataset:"Gestao" query:"decisoes estrategicas"
-```