Fix Bootstrap Icons: Mover de CDN a local - Issue #135

PROBLEMA:
- Iconos de share buttons no se mostraban en staging
- Bootstrap Icons CDN causaba SecurityError (CORS)
- Browser bloqueaba acceso a cssRules del stylesheet cross-origin
- content: "" vacío en ::before pseudo-elements

SOLUCIÓN:
- Descargar Bootstrap Icons v1.11.3 localmente
- assets/vendor/bootstrap-icons.min.css (85KB)
- assets/vendor/fonts/ con woff2 y woff (298KB total)
- Actualizar enqueue-scripts.php para cargar local
- Agregar dependencia en apus-bootstrap
- Version 1.0.12 -> 1.0.13

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

wp-content/themes/apus-theme/functions.php

@@ -14,7 +14,7 @@ if (!defined('ABSPATH')) {
 /**
  * Theme Version
  */
-define('APUS_VERSION', '1.0.12');
+define('APUS_VERSION', '1.0.13');
 
 /**
  * Theme Setup