Add polybar system tray

polybar/default.nix

@@ -18,15 +18,13 @@ in
       alsaSupport = true;
     };
     config = {
-      "colors" = {
-     };
       "bar/top" = {
+        tray-position = "right";
         font-0 = "Noto Sans Mono;2";
         font-1 = "Noto Sans CJK JP;2";
         background = "${colors.background}";
         foreground = "${colors.foreground}";
         width = "100%";
-
         height = "24pt";
         line-size = "3pt";
         padding-right = 1;