docs: Improve documentation and translate comments to English

src/Libs/Database.php

@@ -9,24 +9,28 @@ use PDOException;
 /**
  * Database - DuckBrain
  *
- * Clase diseñada para crear y devolver una única instancia PDO (database).
+ * Class designed to create and return a single PDO instance (database).
  *
  * @author KJ
  * @website https://kj2.me
- * @licence MIT
+ * @license MIT
  */
 class Database extends PDO
 {
     private static array $databases = [];
 
+    /**
+     * Private constructor to prevent direct instantiation.
+     */
     private function __construct()
     {
     }
 
     /**
-     * Devuelve una instancia homogénea (singlenton) de la base de datos (PDO).
+     * Returns a homogeneous (singleton) instance of the database (PDO).
      *
      * @return PDO
+     * @throws Exception If there is an error connecting to the database.
      */
     public static function getInstance(
         string $type = 'mysql',