feat(seo-audit): Add comprehensive SEO audit skill

Add ourdigital-seo-audit skill with:
- Full site audit orchestrator (full_audit.py)
- Google Search Console and PageSpeed API clients
- Schema.org JSON-LD validation and generation
- XML sitemap and robots.txt validation
- Notion database integration for findings export
- Core Web Vitals measurement and analysis
- 7 schema templates (article, faq, product, etc.)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ourdigital-custom-skills/12-ourdigital-seo-audit/templates/schema_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}}"
+  ]
+}