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>

dev-tools/skills/xlsx/scripts/office/schemas/ISO-IEC29500-4_2016/shared-customXmlDataProperties.xsd

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
+  xmlns="http://schemas.openxmlformats.org/officeDocument/2006/customXml"
+  xmlns:s="http://schemas.openxmlformats.org/officeDocument/2006/sharedTypes"
+  targetNamespace="http://schemas.openxmlformats.org/officeDocument/2006/customXml"
+  elementFormDefault="qualified" attributeFormDefault="qualified" blockDefault="#all">
+  <xsd:import namespace="http://schemas.openxmlformats.org/officeDocument/2006/sharedTypes"
+    schemaLocation="shared-commonSimpleTypes.xsd"/>
+  <xsd:complexType name="CT_DatastoreSchemaRef">
+    <xsd:attribute name="uri" type="xsd:string" use="required"/>
+  </xsd:complexType>
+  <xsd:complexType name="CT_DatastoreSchemaRefs">
+    <xsd:sequence>
+      <xsd:element name="schemaRef" type="CT_DatastoreSchemaRef" minOccurs="0" maxOccurs="unbounded"
+      />
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_DatastoreItem">
+    <xsd:sequence>
+      <xsd:element name="schemaRefs" type="CT_DatastoreSchemaRefs" minOccurs="0"/>
+    </xsd:sequence>
+    <xsd:attribute name="itemID" type="s:ST_Guid" use="required"/>
+  </xsd:complexType>
+  <xsd:element name="datastoreItem" type="CT_DatastoreItem"/>
+</xsd:schema>