Add DTOs, exceptions, and jobs for translation service.

Introduced new Data Transfer Objects (DTOs), exceptions, and jobs to enhance the translation service functionality. Updated namespaces for consistency and added rate limiting to the translation provider. Expanded the README with detailed usage instructions.

src/DTO/Translated.php

@@ -0,0 +1,20 @@
+<?php declare(strict_types=1);
+
+namespace KorElf\TranslateLaravel\DTO;
+
+final class Translated
+{
+    private array $data = [];
+
+    public function add(string $key, int $parts): self
+    {
+        $this->data[$key] = $parts;
+
+        return $this;
+    }
+
+    public function toArray(): array
+    {
+        return $this->data;
+    }
+}