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/today/prompts/execute.md

@@ -24,11 +24,6 @@ Invocar:
 1. `/daily-digest` → metricas do dia
 2. `/tasks-overview` → tarefas e workflows
 
-## Passo 3b: Sprint/Spec Activos (silencioso)
-
-Glob SPEC.md e SPRINT.md em /media/ealmeida/Dados/Dev/.
-Ler apenas frontmatter. Filtrar activos. Guardar em ~/.claude-work/today-sprint-{date}.json.
-
 ## Passo 4: Rotinas especiais
 
 - Segunda: planeamento semanal + `/wp-update`