feat: Adds the ability to play audio alert every 30 sec (#6150)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/javascript/dashboard/helper/scriptHelpers.js

@@ -20,6 +20,7 @@ const initializeAudioAlerts = user => {
   const {
     always_play_audio_alert: alwaysPlayAudioAlert,
     enable_audio_alerts: audioAlertType,
+    alert_if_unread_assigned_conversation_exist: alertIfUnreadConversationExist,
     notification_tone: audioAlertTone,
   } = uiSettings;
 
@@ -28,6 +29,7 @@ const initializeAudioAlerts = user => {
     audioAlertType: audioAlertType || 'none',
     audioAlertTone: audioAlertTone || 'ding',
     alwaysPlayAudioAlert: alwaysPlayAudioAlert || false,
+    alertIfUnreadConversationExist: alertIfUnreadConversationExist || false,
   });
 };