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>

perfex-dev/knowledge/datasets.json

@@ -1,5 +1,5 @@
 {
-  "description": "Knowledge sources (NotebookLM + Dify KB) for Perfex CRM Development domain",
+  "description": "Knowledge sources for Perfex CRM Development domain",
   "sources": {
     "notebooklm": {
       "description": "NotebookLM - conhecimento curado profundo via Gemini 2.5 RAG (PRIMARIO)",
@@ -10,23 +10,9 @@
           "title": "Perfex CRM: Gestao de Clientes e Projetos",
           "topics": [
             "perfexcrm"
-          ],
-          "maps_from_dify": "PerfexCRM"
-        }
-      ]
-    },
-    "dify_kb": {
-      "description": "Dify KB - datasets tematicos (FALLBACK)",
-      "query_tool": "mcp__dify-kb__dify_kb_retrieve_segments",
-      "datasets": [
-        {
-          "id": "43354eb6-f0b2-40cc-aa53-44e375ab347c",
-          "name": "PerfexCRM",
-          "priority": 1,
-          "document_count": 144,
-          "word_count": 1547186
+          ]
         }
       ]
     }
   }
-}
+}