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>

project-manager/skills/discover/SKILL.md

@@ -1,19 +1,6 @@
 ---
 name: discover
-description: >
-  Pesquisa e discovery v1.1. Investiga viabilidade, abordagens e estado da arte antes de brainstorm.
-  Pesquisa NotebookLM (Gemini 2.5 + conhecimento curado), Dify KB, web, codebase e Context7.
-  Use when "pesquisar", "investigar", "discover", "como funciona", "existe algo para",
-  "alternativas", "estado da arte", "viabilidade", "research", "antes de comecar".
-author: Descomplicar® Crescimento Digital
-version: 1.1.0
-quality_score: 72
-user_invocable: true
-category: productivity
-tags: [research, discovery, pesquisa, viabilidade, alternativas, estado-arte, notebooklm]
-desk_project: 65
-allowed-tools: Read, Glob, Grep, WebSearch, WebFetch, mcp__dify-kb, mcp__mcp-time, mcp__memory-supabase, mcp__plugin_context7_context7, mcp__notebooklm
-mcps: dify-kb, mcp-time, memory-supabase, context7, notebooklm
+description: Pesquisa e discovery de viabilidade, abordagens e estado da arte. Pesquisa NotebookLM, Dify KB, web, codebase e Context7.
 ---
 
 # /discover v1.1 - Pesquisa e Discovery