make everything more modular + basic kitagawa config using gnome

hosts/kitagawa/default.nix

@@ -0,0 +1,45 @@
+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+
+{
+  config,
+  pkgs,
+  ...
+}: let
+modules-dir = ../../modules;
+in {
+  imports = [
+    ../../global-default.nix
+    ./hardware-configuration.nix
+    "${modules-dir}/nh.nix"
+    "${modules-dir}/home-manager.nix"
+    "${modules-dir}/zsh.nix"
+    "${modules-dir}/display-managers/gdm.nix"
+    "${modules-dir}/desktop-environments/gnome.nix"
+  ];
+
+  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
+
+  # Configure network proxy if necessary
+  # networking.proxy.default = "http://user:password@proxy:port/";
+  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+
+  # Some programs need SUID wrappers, can be configured further or are
+  # started in user sessions.
+  # programs.mtr.enable = true;
+  programs.gnupg.agent = {
+    enable = true;
+  };
+
+  # List services that you want to enable:
+
+  # Enable the OpenSSH daemon.
+  # services.openssh.enable = true;
+
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  # networking.firewall.enable = false;
+}