feat: Added OneSignal Messaging Adapter

src/Utopia/Messaging/Adapters/Push/OneSignal.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Utopia\Messaging\Adapters\Push;
+
+use Exception;
+use Utopia\Messaging\Adapters\Push as PushAdapter;
+use Utopia\Messaging\Messages\Push;
+
+class OneSignal extends PushAdapter
+{
+    /**
+     * @param  string  $authKey
+     */
+    public function __construct(
+        private string $authKey,
+    ) {
+    }
+
+    /**
+     * Get adapter name.
+     *
+     * @return string
+     */
+    public function getName(): string
+    {
+        return 'OneSignal';
+    }
+
+    /**
+     * Get max messages per request.
+     *
+     * @return int
+     */
+    public function getMaxMessagesPerRequest(): int
+    {
+        return 6000;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @throws \Exception
+     */
+    protected function process(Push $message): string
+    {
+        return $this->request(
+
+        );
+    }
+}