add: sns service for aws

src/main/java/com/backend/glowhouse/aws/sns/SnsNotificationSender.java

+package com.backend.glowhouse.aws.sns;
+
+import com.amazonaws.services.sns.AmazonSNS;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cloud.aws.messaging.core.NotificationMessagingTemplate;
+
+public class SnsNotificationSender {
+    private final NotificationMessagingTemplate notificationMessagingTemplate;
+
+    @Autowired
+    public SnsNotificationSender(AmazonSNS amazonSns) {
+        this.notificationMessagingTemplate = new NotificationMessagingTemplate(amazonSns);
+    }
+
+    public void sendIOCommandForLight(String subject, String message) {
+        this.notificationMessagingTemplate.sendNotification("awsiot_to_localgateway", message, subject);
+    }
+}
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