Add BusinessConnection event support

src/TgBotLib/Events/BusinessConnectionEvent.php

@@ -0,0 +1,28 @@
+<?php
+
+    namespace TgBotLib\Events;
+
+    use TgBotLib\Abstracts\UpdateEvent;
+    use TgBotLib\Enums\UpdateEventType;
+    use TgBotLib\Objects\BusinessConnection;
+
+    abstract class BusinessConnectionEvent extends UpdateEvent
+    {
+        /**
+         * @inheritDoc
+         */
+        public static function getEventType(): UpdateEventType
+        {
+            return UpdateEventType::BUSINESS_CONNECTION;
+        }
+
+        /**
+         * Fetches the BusinessConnection instance associated with this update.
+         *
+         * @return BusinessConnection The business connection associated with this update.
+         */
+        protected function getBusinessConnection(): BusinessConnection
+        {
+            return $this->update->getBusinessConnection();
+        }
+    }