Enhance lab sheets with action item styling and installation guide

- Added a new Action Items Guide to provide styling classes for highlighting important sections in lab sheets.
- Introduced an INSTALL.md file detailing Jekyll installation and testing procedures.
- Implemented action item and warning item styles in the main stylesheet for better visual distinction.
- Updated lab content to utilize new action item classes for clarity and emphasis on critical instructions.
- Enhanced JavaScript functionality to process custom highlight syntax in lab content.

verify-setup.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+# Verification script for Jekyll setup
+
+echo "🔍 Verifying Jekyll setup..."
+echo ""
+
+# Check if we're in the right directory
+if [ -f "_config.yml" ] && [ -d "_labs" ]; then
+    echo "✅ In correct Jekyll project directory"
+else
+    echo "❌ Not in a Jekyll project directory"
+    exit 1
+fi
+
+# Check for required files
+echo "🔍 Checking required files..."
+required_files=("_config.yml" "index.md" "_layouts/default.html" "_layouts/lab.html" "assets/css/hacktivity-theme.scss")
+for file in "${required_files[@]}"; do
+    if [ -f "$file" ]; then
+        echo "✅ $file exists"
+    else
+        echo "❌ $file is missing"
+    fi
+done
+
+# Check for lab files
+echo ""
+echo "🔍 Checking lab files..."
+lab_count=$(find _labs -name "*.md" | wc -l)
+echo "📄 Found $lab_count lab files"
+
+# Check for plugins
+echo ""
+echo "🔍 Checking plugins..."
+if [ -f "_plugins/include_subdirectories.rb" ]; then
+    echo "✅ Subdirectory inclusion plugin exists"
+else
+    echo "❌ Subdirectory inclusion plugin missing"
+fi
+
+# Check Gemfile
+echo ""
+echo "🔍 Checking Gemfile..."
+if [ -f "Gemfile" ]; then
+    echo "✅ Gemfile exists"
+    echo "📦 Dependencies:"
+    grep "gem " Gemfile | sed 's/^/   /'
+else
+    echo "❌ Gemfile missing"
+fi
+
+echo ""
+echo "🎯 Setup verification complete!"
+echo ""
+echo "Next steps:"
+echo "1. Install Ruby (see INSTALL.md)"
+echo "2. Run: ./test-jekyll.sh"
+echo "3. Open http://localhost:4000 in your browser"