Add Base32 decoding method and implement SecretOtp class with serialization methods

src/Socialbox/Objects/Standard/SecretOtp.php

@@ -0,0 +1,26 @@
+<?php
+
+    namespace Socialbox\Objects\Standard;
+
+    use Socialbox\Interfaces\SerializableInterface;
+
+    class SecretOtp implements SerializableInterface
+    {
+
+
+        /**
+         * @inheritDoc
+         */
+        public static function fromArray(array $data): object
+        {
+            // TODO: Implement fromArray() method.
+        }
+
+        /**
+         * @inheritDoc
+         */
+        public function toArray(): array
+        {
+            // TODO: Implement toArray() method.
+        }
+    }