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/Parameter.php

@@ -0,0 +1,41 @@
+<?php declare(strict_types=1);
+
+namespace KorElf\TranslateLaravel\DTO;
+
+use KorElf\TranslateLaravel\Enums\TextType;
+
+final readonly class Parameter
+{
+    public function __construct(
+        private string   $text,
+        private TextType $textType,
+        private string   $targetLanguageCode,
+        private ?string  $sourceLanguageCode = null,
+        private ?string  $driver = null
+    ) { }
+
+    public function getText(): string
+    {
+        return $this->text;
+    }
+
+    public function getTextType(): TextType
+    {
+        return $this->textType;
+    }
+
+    public function getTargetLanguageCode(): string
+    {
+        return $this->targetLanguageCode;
+    }
+
+    public function getSourceLanguageCode(): ?string
+    {
+        return $this->sourceLanguageCode;
+    }
+
+    public function getDriver(): ?string
+    {
+        return $this->driver;
+    }
+}