refactor: add decryptionFailed message and exception method

Author: patel-vansh

system/Encryption/Exceptions/EncryptionException.php

@@ -82,4 +82,14 @@ public static function forEncryptionFailed()
     {
         return new static(lang('Encryption.encryptionFailed'));
     }
+
+    /**
+     * Thrown during data decryption when a problem or error occurred.
+     *
+     * @return static
+     */
+    public static function forDecryptionFailed()
+    {
+        return new static(lang('Encryption.decryptionFailed'));
+    }
 }

system/Language/en/Encryption.php

@@ -19,4 +19,5 @@
     'starterKeyNeeded'     => 'Encrypter needs a starter key.',
     'authenticationFailed' => 'Decrypting: authentication failed.',
     'encryptionFailed'     => 'Encryption failed.',
+    'decryptionFailed'     => 'Decryption failed.',
 ];