Light refactor, move unified changes of sway into common linux header

nix/system/linux.nix

@@ -5,6 +5,11 @@
   ];
 
   programs = {
+    xwayland.enable = true;
+    sway = {
+      enable = true;
+      package = pkgs.swayfx;
+    };
     zsh.enable = true;
   };
 

nix/system/linux_aarch.nix

@@ -4,13 +4,6 @@
     apple-silicon-support.nixosModules.apple-silicon-support
   ];
 
-  programs = {
-    sway = {
-      enable = true;
-      package = pkgs.swayfx;
-    };
-  };
-
   boot = {
     kernelParams = [ "apple_dcp.show_notch=0" ];
     loader.efi.canTouchEfiVariables = false;

nix/system/linux_x86.nix

@@ -15,14 +15,9 @@
   networking.hostName = "walnut-nixos";
 
   programs = {
-    xwayland.enable = true;
-    sway = {
-      enable = true;
-      package = pkgs.swayfx;
-      extraOptions = [
+    sway.extraOptions = [
       "--unsupported-gpu"
     ];
-    };
     steam.enable = true;
   };
 }