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/seo-on-page.md

@@ -0,0 +1,31 @@
+# SEO On-Page Audit
+
+On-page SEO analysis for meta tags, headings, content, and links.
+
+## Triggers
+- "analyze page SEO", "check meta tags", "on-page audit"
+
+## Capabilities
+
+1. **Meta Tag Analysis** - Title, description, OG tags, canonical
+2. **Heading Structure** - H1-H6 hierarchy validation
+3. **Content Analysis** - Word count, keyword density
+4. **Link Audit** - Internal/external links, broken links
+
+## Scripts
+
+```bash
+# Full page analysis
+python ourdigital-custom-skills/11-seo-on-page-audit/code/scripts/page_analyzer.py \
+  --url https://example.com/page
+
+# Multiple pages
+python ourdigital-custom-skills/11-seo-on-page-audit/code/scripts/page_analyzer.py \
+  --urls urls.txt --output report.json
+```
+
+## Output
+- Meta tag completeness score
+- Heading structure report
+- Content quality metrics
+- Link health status