refactor: change log level and add exceptions

src/Exception/Provider/EppContactIsAvailableException.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Exception\Provider;
+
+class EppContactIsAvailableException extends AbstractProviderException
+{
+    public static function fromContact(string $handle): self
+    {
+        return new self("At least one of the entered contacts cannot be used because it is indicated as available ($handle)");
+    }
+}