Replace old cards with verified HMPL comparison table

[ADITYATIWARI342005]

This PR addresses issue #177 by replacing the outdated three-card block with a modern, data-verified comparison table showcasing HMPL against Alpine.js and HTMX.

Design & Implementation

• Custom responsive Vue component matching existing site gradient aesthetic
• Hover effects and visual indicators consistent with current design language
• FontAwesome icons already in project dependencies
• Mobile-friendly with proper breakpoints
• Links to existing metrics section showing real-world performance advantages

Data Accuracy Improvements

• Verified bundle sizes: Alpine.js ~8.4KB, HTMX ~14.1KB (gzipped & minified)
• References existing metrics showing HMPL's real-world advantages (1.67x smaller than vanilla, 1.14x smaller than Alpine.js)
• Added data source attribution and disclaimers
• 13 comparison points with fact-checked information

Technical Quality

• Zero linting errors
• Follows Vue 3 composition patterns
• Semantic HTML with accessibility considerations
• No additional dependencies required

Closes #177