feat: add new host and start modularizing system configuration

hosts/neon/default.nix

@@ -1,6 +1,13 @@
-{ ... }:
+{ inputs, ... }:
 {
   imports = [
+    ../../modules/nixos/base.nix
+    ../../modules/nixos/audio.nix
+    ../../modules/nixos/desktop.nix
+    # https://github.com/NixOS/nixos-hardware/blob/master/README.md#using-nix-flakes-support
+    inputs.nixos-hardware.nixosModules.gpd-pocket-3
+     # override from nixos-hardware
+    ({config, lib, ...}: { services.xserver.videoDrivers = lib.mkForce [ "modesetting" ]; })
     ./hardware-configuration.nix
     ./configuration.nix
   ];