Admin New Player Notification Sound (#24327)

play a sound to active admins when a new player joins

Content.Shared/CCVar/CCVars.cs

@@ -779,6 +779,12 @@ namespace Content.Shared.CCVar
         public static readonly CVarDef<bool> SeeOwnNotes =
             CVarDef.Create("admin.see_own_notes", false, CVar.ARCHIVE | CVar.REPLICATED | CVar.SERVER);
 
+        /// <summary>
+        /// Should the server play a quick sound to the active admins whenever a new player joins?
+        /// </summary>
+        public static readonly CVarDef<bool> AdminNewPlayerJoinSound =
+            CVarDef.Create("admin.new_player_join_sound", false, CVar.SERVERONLY);
+
         /// <summary>
         /// The amount of days before the note starts fading. It will slowly lose opacity until it reaches stale. Set to 0 to disable.
         /// </summary>