refactor(skills): Restructure skills to dual-platform architecture

Major refactoring of ourdigital-custom-skills with new numbering system:

## Structure Changes
- Each skill now has code/ (Claude Code) and desktop/ (Claude Desktop) versions
- New progressive numbering: 01-09 General, 10-19 SEO, 20-29 GTM, 30-39 OurDigital, 40-49 Jamie

## Skill Reorganization
- 01-notion-organizer (from 02)
- 10-18: SEO tools split into focused skills (technical, on-page, local, schema, vitals, gsc, gateway)
- 20-21: GTM audit and manager
- 30-32: OurDigital designer, research, presentation
- 40-41: Jamie brand editor and audit

## New Files
- .claude/commands/: Slash command definitions for all skills
- CLAUDE.md: Updated with new skill structure documentation
- REFACTORING_PLAN.md: Migration documentation
- COMPATIBILITY_REPORT.md, SKILLS_COMPARISON.md: Analysis docs

## Removed
- Old skill directories (02-05, 10-14, 20-21 old numbering)
- Consolidated into new structure with _archive/ for reference

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

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

.claude/commands/gtm-manager.md

@@ -0,0 +1,49 @@
+# GTM Manager
+
+Full GTM management with dataLayer injection and tag generation.
+
+## Triggers
+- "GTM manager", "generate dataLayer tag", "dataLayer 태그 생성"
+
+## Capabilities
+
+1. **Full Audit** - Everything in gtm-audit plus more
+2. **DataLayer Injector** - Generate custom HTML tags
+3. **Event Mapping** - Map site actions to GA4 events
+4. **Notion Export** - Save audit results to Notion
+
+## Scripts
+
+```bash
+# Full GTM management
+python ourdigital-custom-skills/21-gtm-manager/code/scripts/gtm_manager.py \
+  --url https://example.com --full-audit
+
+# Generate dataLayer tag
+python ourdigital-custom-skills/21-gtm-manager/code/scripts/gtm_manager.py \
+  --generate-tag purchase --output purchase_tag.html
+
+# Export to Notion
+python ourdigital-custom-skills/21-gtm-manager/code/scripts/gtm_manager.py \
+  --url https://example.com --notion-export --database DATABASE_ID
+```
+
+## DataLayer Tag Templates
+
+### Purchase Event
+```html
+<script>
+dataLayer.push({
+  'event': 'purchase',
+  'ecommerce': {
+    'transaction_id': '{{Order ID}}',
+    'value': {{Order Total}},
+    'currency': 'KRW',
+    'items': [...]
+  }
+});
+</script>
+```
+
+## Environment
+- `NOTION_TOKEN` - For Notion export (optional)