add event scheduler file

src/app/EventScheduler.h

@@ -0,0 +1,50 @@
+/*
+ *
+ *    Copyright (c) 2024 Project CHIP Authors
+ *    All rights reserved.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+/**
+ * @file
+ *
+ * @brief
+ *   Define EventScheduler interface. Event scheduler is used by EventManagement to notify that events are ready to be scheduled.
+ *   Usually this is implemented by the Reporting Engine to find the proper ReadHandlers and deliver the events.
+ *
+ */
+#pragma once
+
+#include <app/ConcreteEventPath.h>
+
+namespace chip {
+namespace app {
+
+class EventScheduler
+{
+public:
+    virtual ~EventScheduler() = default;
+
+    /**
+     * @brief
+     *  Schedule the event delivery
+     *
+     * @param[in] aPath          The path to the event.
+     * @param[in] aBytesWritten  Bytes that the event is written into the buffer in EventManagement.
+     */
+    CHIP_ERROR virtual ScheduleEventDelivery(ConcreteEventPath & aPath, uint32_t aBytesWritten) = 0;
+};
+
+} // namespace app
+} // namespace chip