Add captcha image generation functionality.

app/Http/Resources/Api/V1/Captcha.php

@@ -0,0 +1,31 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Resources\Api\V1;
+
+use App\ServiceResults\Api\V1\CaptchaService\Captcha as CaptchaResult;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+final class Captcha extends JsonResource
+{
+
+    /**
+     * @var CaptchaResult
+     */
+    public $resource;
+
+    /**
+     * Transform the resource into an array.
+     *
+     * @param  Request $request
+     * @return array
+     */
+    public function toArray(Request $request): array
+    {
+        return [
+            'image_base64'      => $this->resource->getImageBase64(),
+            'image_text_base64' => $this->resource->getImageTextBase64(),
+            'captcha_key'       => $this->resource->getKey()
+        ];
+    }
+}