Restructure skill numbering: SEO 11-30, GTM 60-69, reserve 19-28 for future skills

Renumber 12 existing skills to new ranges:
- SEO: 11→13, 12→18, 13→16, 14→17, 15→14, 16→15, 17→29, 18→30, 19→12
- GTM: 20→60, 21→61, 22→62

Update cross-references in gateway architect/builder skills, GTM guardian
README, CLAUDE.md (skill tables + directory layout), and AGENTS.md
(domain routing ranges).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

custom-skills/17-seo-schema-generator/desktop/templates/organization.json

@@ -0,0 +1,37 @@
+{
+  "@context": "https://schema.org",
+  "@type": "Organization",
+  "name": "{{name}}",
+  "url": "{{url}}",
+  "logo": "{{logo_url}}",
+  "description": "{{description}}",
+  "foundingDate": "{{founding_date}}",
+  "founders": [
+    {
+      "@type": "Person",
+      "name": "{{founder_name}}"
+    }
+  ],
+  "address": {
+    "@type": "PostalAddress",
+    "streetAddress": "{{street_address}}",
+    "addressLocality": "{{city}}",
+    "addressRegion": "{{region}}",
+    "postalCode": "{{postal_code}}",
+    "addressCountry": "{{country}}"
+  },
+  "contactPoint": [
+    {
+      "@type": "ContactPoint",
+      "telephone": "{{phone}}",
+      "contactType": "customer service",
+      "availableLanguage": ["Korean", "English"]
+    }
+  ],
+  "sameAs": [
+    "{{facebook_url}}",
+    "{{twitter_url}}",
+    "{{linkedin_url}}",
+    "{{instagram_url}}"
+  ]
+}