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>

ourdigital-custom-skills/20-gtm-audit/code/scripts/requirements.txt

@@ -0,0 +1 @@
+playwright>=1.40.0

ourdigital-custom-skills/20-gtm-audit/code/scripts/setup.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+# GTM Audit Tool Setup Script
+
+echo "🔧 Setting up GTM Audit Tool..."
+
+# Check Python
+if ! command -v python3 &> /dev/null; then
+    echo "❌ Python 3 is required but not installed."
+    exit 1
+fi
+
+echo "✅ Python 3 found"
+
+# Install dependencies
+echo "📦 Installing Python dependencies..."
+pip install -r requirements.txt
+
+# Install Playwright browsers
+echo "🌐 Installing Playwright browsers..."
+playwright install chromium
+
+echo ""
+echo "✅ Setup complete!"
+echo ""
+echo "Usage:"
+echo "  python gtm_audit.py --url 'https://example.com' --journey full"
+echo ""
+echo "For Claude Code:"
+echo "  claude"
+echo "  > Run a GTM audit on https://example.com"