Revived API /api/v1/captcha.

Now a new captcha is created to check for a bot.

config/captcha.php

@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'waiting_for_captcha_verification_in_seconds' => env('WAITING_FOR_CAPTCHA_VERIFICATION_IN_SECONDS', 900),
     'imageClass' => \App\Captcha\Images\Image::class,
     'types' => [
         'string' => [