waybar: Move modules to separate attribute set

Makes it possible to use the same modules in multiple bars.

home/waybar.nix

@@ -6,26 +6,7 @@ let
   position = "top";
   opposite = builtins.replaceStrings ["left" "right" "top" "bottom"] ["right" "left" "bottom" "top"] position;
   isVertical = position == "left" || position == "right";
-in
+  modules = {
-{
-  programs.waybar = {
-    enable = true;
-
-    settings = {
-      mainBar = {
-        layer = "top";
-        position = position;
-        width = if isVertical then 45 else null;
-        height = if isVertical then null else 45;
-        spacing = 8;
-
-        autohide = true;
-        exclusive = false;
-        autohide-starthidden = true;
-
-        modules-left = if icons then [ "wlr/taskbar" ] else [ "wlr/workspaces" "custom/new-workspace" ];
-        modules-right = [ "tray" "wireplumber" "backlight" "battery" "clock" ];
-
     tray = {
       icon-size = 24;
       spacing = 8;
@@ -102,6 +83,26 @@ in
       tooltip = false;
     };
   };
+in
+{
+  programs.waybar = {
+    enable = true;
+
+    settings = {
+      mainBar = modules // {
+        layer = "top";
+        position = position;
+        width = if isVertical then 45 else null;
+        height = if isVertical then null else 45;
+        spacing = 8;
+
+        autohide = true;
+        exclusive = false;
+        autohide-starthidden = true;
+
+        modules-left = if icons then [ "wlr/taskbar" ] else [ "wlr/workspaces" "custom/new-workspace" ];
+        modules-right = [ "tray" "wireplumber" "backlight" "battery" "clock" ];
+      };
     };
 
     style = with config.lib.stylix.colors; lib.mkForce /* css */ ''