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-technical.md

@@ -0,0 +1,33 @@
+# SEO Technical Audit
+
+Technical SEO audit for robots.txt and sitemap validation.
+
+## Triggers
+- "check robots.txt", "validate sitemap", "technical SEO"
+
+## Capabilities
+
+1. **Robots.txt Analysis** - Parse and validate robots.txt rules
+2. **Sitemap Validation** - Check XML sitemap structure and URLs
+3. **Sitemap Crawling** - Crawl all URLs in sitemap for issues
+
+## Scripts
+
+```bash
+# Check robots.txt
+python ourdigital-custom-skills/10-seo-technical-audit/code/scripts/robots_checker.py \
+  --url https://example.com
+
+# Validate sitemap
+python ourdigital-custom-skills/10-seo-technical-audit/code/scripts/sitemap_validator.py \
+  --url https://example.com/sitemap.xml
+
+# Crawl sitemap URLs
+python ourdigital-custom-skills/10-seo-technical-audit/code/scripts/sitemap_crawler.py \
+  --sitemap https://example.com/sitemap.xml --output report.json
+```
+
+## Output
+- Robots.txt rule analysis
+- Sitemap structure validation
+- URL accessibility report