feat: restructure and move apps into their own configs (#2)

home/linux/gtk.nix

@@ -0,0 +1,35 @@
+{
+  pkgs,
+  device,
+  ...
+}: {
+  gtk = {
+    enable = device.hasGui;
+    theme = {
+      name = "catppuccin-mocha-mauve-standard+normal";
+      package = pkgs.adwaita-icon-theme;
+      # package = pkgs.catppuccin-gtk.override {
+      #   variant = "mocha";
+      #   size = "standard";
+      #   accents = ["mauve"];
+      #   tweaks = ["normal"];
+      # };
+    };
+
+    iconTheme = {
+      name = "Papirus-Dark";
+      package = pkgs.catppuccin-papirus-folders.override {
+        accent = "mauve";
+        flavor = "mocha";
+      };
+    };
+
+    cursorTheme = {
+      name = "Vanillay-DMZ";
+      package = pkgs.vanilla-dmz;
+    };
+
+    gtk3.extraConfig = {gtk-application-prefer-dark-theme = 1;};
+    gtk4.extraConfig = {gtk-application-prefer-dark-theme = 1;};
+  };
+}