feat(services): add public holidays states infra

app/Services/WorkingDays/PublicHolidays/PublicHolidaysStateFactory.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\WorkingDays\PublicHolidays;
+
+use App\Services\WorkingDays\PublicHolidays\Storage\PublicHolidaysStorageInterface;
+use App\Services\WorkingDays\WorkingDayDeterminerInterface;
+
+class PublicHolidaysStateFactory
+{
+    public function __construct(
+        private readonly PublicHolidaysStorageInterface $holidaysStorage,
+    ) {
+    }
+
+    public function createStoreForCountry(string $countryCode): PublicHolidaysStateStorageInterface
+    {
+        return $this->getStateImpl($countryCode);
+    }
+
+    public function createDeterminerForCountry(string $countryCode): PublicHolidaysStateDeterminerInterface&WorkingDayDeterminerInterface
+    {
+        return $this->getStateImpl($countryCode);
+    }
+
+    /**
+     * @param string $countryCode
+     * @return PublicHolidaysStateDeterminer
+     */
+    protected function getStateImpl(string $countryCode): PublicHolidaysStateDeterminer
+    {
+        return new PublicHolidaysStateDeterminer($this->holidaysStorage, $countryCode);
+    }
+}