Refactor the whole configuration

Reviewed-on: #1

modules/nixos/desktop/gnome/default.nix

@@ -0,0 +1,62 @@
+{ pkgs, username, ... }:
+
+{
+  services.xserver = {
+    enable = false;
+    displayManager.gdm.enable = true;
+    desktopManager.gnome.enable = true;
+  };
+
+  environment.gnome.excludePackages = with pkgs; [
+    orca
+    geary
+    gnome-disk-utility
+    gnome-backgrounds
+    gnome-user-docs
+    epiphany
+    yelp
+    gnome-software
+    totem
+    snapshot
+    simple-scan
+    gnome-console
+    gnome-text-editor
+    gnome-tour
+    gnome-bluetooth
+    gnome-music
+    gnome-maps
+    gnome-contacts
+    gnome-calendar
+    gnome-connections
+  ];
+
+  environment.systemPackages = with pkgs; [
+    ghostty
+    dconf-editor
+  ] ++ (with pkgs.gnomeExtensions; [
+    caffeine
+    accent-directories
+    just-perfection
+    quick-settings-tweaker
+    forge
+  ]);
+
+  environment.persistence."/nix/persist" = {
+    directories = [
+      "/var/lib/AccountsService"
+    ];
+    users."${username}" = {
+      directories = [
+        ".config/dconf"
+
+        # Right now I don't really modify much here other than the tab group tab colour
+        # but I might in the future want to manage these files using home-manager instead
+        # of having them set imperatively and simply persisted.
+        ".config/forge"
+      ];
+      files = [
+        ".config/monitors.xml"
+      ];
+    };
+  };
+}