Add secure public directory structure with .htaccess

- Created public/ directory for web-accessible files
- Moved content and assets to public/ subdirectories
- Added .htaccess files for security and routing
- Updated config.php to use public/content path
- Blocked direct access to PHP files and sensitive directories
- Added URL routing to index.php
- Enhanced security headers and PHP settings

public/assets/favicon.svg

@@ -0,0 +1,23 @@
+<svg width="16" height="16" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <linearGradient id="codepress-gradient-small" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#0d6efd;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#6610f2;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+  
+  <!-- Background circle -->
+  <circle cx="8" cy="8" r="7.5" fill="url(#codepress-gradient-small)" stroke="#ffffff" stroke-width="0.5"/>
+  
+  <!-- Code brackets -->
+  <path d="M4 5 L3 6 L3 10 L4 11" stroke="#ffffff" stroke-width="1" fill="none" stroke-linecap="round"/>
+  <path d="M12 5 L13 6 L13 10 L12 11" stroke="#ffffff" stroke-width="1" fill="none" stroke-linecap="round"/>
+  
+  <!-- Code slash -->
+  <path d="M7 4 L9 12" stroke="#ffffff" stroke-width="1" stroke-linecap="round"/>
+  
+  <!-- Press dots -->
+  <circle cx="6" cy="13" r="0.75" fill="#ffffff"/>
+  <circle cx="8" cy="13" r="0.75" fill="#ffffff"/>
+  <circle cx="10" cy="13" r="0.75" fill="#ffffff"/>
+</svg>