Migrate backend to Porto architecture and fix minor bugs

- Fully transitioned the backend to the Porto architectural pattern
- Improved code organization and maintainability
- Fixed minor bugs and inconsistencies

app/Ship/Helpers/ByteConverter.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Ship\Helpers;
+
+class ByteConverter
+{
+    public static function bytesToHuman($bytes)
+    {
+        $units = ['Б', 'КиБ', 'МиБ', 'ГиБ', 'ТиБ', 'ПиБ'];
+
+        for ($i = 0; $bytes > 1024; $i++) {
+            $bytes /= 1024;
+        }
+
+        return round($bytes, 2) . ' ' . $units[$i];
+    }
+}