Add stacking layout rules for chat apps

programs/sway/default.nix

@@ -128,6 +128,15 @@
               {app_id = "Nxplayer\.bin";}
               {class = "Nxplayer\.bin";}
             ])
+          ++ (map (criteria: {
+              inherit criteria;
+              command = "layout stacking";
+            }) [
+              {app_id = "WebCord";}
+              {app_id = "signal";}
+              {app_id = "whatsapp-for-linux";}
+              {app_id = "teams-for-linux";}
+            ])
           ++ [];
       };
       floating.border = 1;