Added better gnome compatibility

modules/gnome.nix

@@ -1,6 +1,11 @@
-{...}: {
+{pkgs, ...}: {
   services.xserver.enable = true;
   services.xserver.displayManager.gdm.enable = true;
   services.xserver.desktopManager.gnome.enable = true;
   programs.dconf.enable = true;
+  environment.systemPackages = [pkgs.gnome.adwaita-icon-theme];
+  environment.variables = {
+    GIT_ASKPASS = "${pkgs.kdePackages.ksshaskpass.out}/bin/ksshaskpass";
+    NIXOS_OZONE_WL = "1";
+  };
 }