fix: add realtime class to client

Author: iBotPeaches

src/Client.php

@@ -5,6 +5,7 @@
 namespace OpenAI;
 
 use OpenAI\Contracts\ClientContract;
+use OpenAI\Contracts\Resources\RealtimeContract;
 use OpenAI\Contracts\Resources\ThreadsContract;
 use OpenAI\Contracts\Resources\VectorStoresContract;
 use OpenAI\Contracts\TransporterContract;
@@ -21,6 +22,7 @@
 use OpenAI\Resources\Images;
 use OpenAI\Resources\Models;
 use OpenAI\Resources\Moderations;
+use OpenAI\Resources\Realtime;
 use OpenAI\Resources\Responses;
 use OpenAI\Resources\Threads;
 use OpenAI\Resources\VectorStores;
@@ -168,6 +170,16 @@ public function assistants(): Assistants
         return new Assistants($this->transporter);
     }
 
+    /**
+     * Communicate with a model in real time using WebRTC or WebSockets.
+     *
+     * @see https://platform.openai.com/docs/api-reference/realtime
+     */
+    public function realtime(): RealtimeContract
+    {
+        return new Realtime($this->transporter);
+    }
+
     /**
      * Create threads that assistants can interact with.
      *