Restructure project for security and offline capability

- Move content outside public web root for security
- Consolidate all code and assets in engine/ directory
- Download Bootstrap locally for offline functionality
- Update public/ to contain only entry point files
- Add router.php for PHP development server security
- Update README.md with new structure and setup instructions
- Block direct access to content files via URL
- Maintain clean separation between content and code

public/index.php

@@ -1,8 +1,8 @@
 <?php
 
-require_once 'config.php';
+require_once __DIR__ . '/../engine/core/config.php';
 
-$config = include 'config.php';
+$config = include __DIR__ . '/../engine/core/config.php';
 
 class CodePressCMS {
     private $config;
@@ -437,5 +437,13 @@ class CodePressCMS {
     }
 }
 
+// Block direct access to content files
+$requestUri = $_SERVER['REQUEST_URI'];
+if (strpos($requestUri, '/content/') !== false) {
+    http_response_code(403);
+    echo '<h1>403 - Forbidden</h1><p>Direct access to content files is not allowed.</p>';
+    exit;
+}
+
 $cms = new CodePressCMS($config);
 $cms->render();