Add browser notifications sound (#8515)

Signed-off-by: Anton Alexeyev <alexeyev.anton@gmail.com>

plugins/notification/src/index.ts

@@ -62,6 +62,7 @@ export interface BrowserNotification extends Doc {
   messageClass?: Ref<Class<ActivityMessage>>
   objectId: Ref<Doc>
   objectClass: Ref<Class<Doc>>
+  soundAlert: boolean
 }
 
 export interface PushData {
@@ -405,6 +406,9 @@ const notification = plugin(notificationId, {
     Inbox: '' as Asset,
     BellCrossed: '' as Asset
   },
+  sound: {
+    InboxNotification: '' as Asset
+  },
   string: {
     Notification: '' as IntlString,
     Notifications: '' as IntlString,