redesign: Hacker theme for security researcher portfolio

- Complete visual overhaul with cyberpunk/terminal aesthetic
- Dark theme with matrix green (#00ff41), cyan, magenta accents
- Terminal-styled sections with command prompts
- Sharp angular design (removed all rounded corners)
- Added glowing borders, scanline effects, animations
- New SVG favicon with terminal prompt icon
- Added framer-motion page transitions for smooth theme switching
- "Enter my zen world" section for calm pastel pages
- Updated metadata/SEO for security researcher branding
- Social links: GitHub, LinkedIn, X, Email

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

public/icon.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" fill="none">
+  <rect width="32" height="32" fill="#0a0a0a"/>
+  <text x="4" y="22" font-family="monospace" font-size="18" font-weight="bold" fill="#00ff41">&gt;_</text>
+</svg>