refactor: move system specific modules into system/modules

modules/common.nix

@@ -1,40 +0,0 @@
-# Contains common configration for all machines
-
-{
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  # Set your time zone.
-  time.timeZone = "Asia/Singapore";
-
-  # Select internationalisation properties.
-  i18n.defaultLocale = "en_SG.UTF-8";
-
-  i18n.extraLocaleSettings = {
-    LC_ADDRESS = "en_SG.UTF-8";
-    LC_IDENTIFICATION = "en_SG.UTF-8";
-    LC_MEASUREMENT = "en_SG.UTF-8";
-    LC_MONETARY = "en_SG.UTF-8";
-    LC_NAME = "en_SG.UTF-8";
-    LC_NUMERIC = "en_SG.UTF-8";
-    LC_PAPER = "en_SG.UTF-8";
-    LC_TELEPHONE = "en_SG.UTF-8";
-    LC_TIME = "en_SG.UTF-8";
-  };
-
-  # Configure keymap in X11
-  services.xserver.xkb = {
-    layout = "us";
-    variant = "";
-  };
-
-  # Define a user account. Don't forget to set a password with ‘passwd’.
-  users.users.rafiq = {
-    isNormalUser = true;
-    description = "rafiq";
-    extraGroups = [ "networkmanager" "wheel" ];
-  };
-
-  # Allow unfree packages
-  nixpkgs.config.allowUnfree = true;
-}

modules/networking.nix

@@ -1,39 +0,0 @@
-#
-# Common networking settings for all machines.
-# Anything system-specific should not be here.
-#
-{
-  networking = {
-    # Enable networkManager
-    # TODO: Look into the networkManager options.
-    networkmanager.enable = true;
-
-    # Configures a simple stateful firewall.
-    # By default, it doesn't allow any incoming connections.
-    firewall = {
-      enable = true; 
-      allowedTCPPorts = [ 
-        22 # SSH
-      ];
-      allowedUDPPorts = [];
-    };
-  };
-
-  # Add binary caches to avoid having to compile them
-  nix.settings = {
-    substituters = [
-      "https://hyprland.cachix.org" 
-      "https://cuda-maintainers.cachix.org" 
-      "https://nix-community.cachix.org" 
-    ];
-    trusted-public-keys = [
-      "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc=" 
-      "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
-      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-    ];
-  };
-
-  # TODO: look into openssh and tailscale settings.
-  services.openssh.enable = true;
-  services.tailscale.enable = true;
-}

modules/nvidia.nix

@@ -1,38 +0,0 @@
-{ pkgs, config, inputs, ... }:
-let
-  hyprland-pkgs = inputs.hyprland.inputs.nixpkgs.legacyPackages.${pkgs.stdenv.hostPlatform.system};
-in
-{
-  hardware = {
-    graphics = {
-      enable = true;
-      package = hyprland-pkgs.mesa.drivers;
-      extraPackages = with pkgs; [
-        nvidia-vaapi-driver
-        ocl-icd
-        cudaPackages.cudatoolkit
-      ];
-    };
-    nvidia = {
-      open = true;
-      package = config.boot.kernelPackages.nvidiaPackages.latest;
-    };
-  };
-
-  services.xserver = {
-    enable = true;
-    videoDrivers = [ "nvidia" ];
-  };
-
-  environment.variables = {
-    NIXOS_OZONE_WL = "1"; # Hint to electron apps to use Wayland
-    LIBVA_DRIVER_NAME = "nvidia";
-    __GLX_VENDOR_LIBRARY_NAME = "nvidia";
-    NVD_BACKEND = "direct"; # Set VAAPI driver backend
-  };
-
-  environment.systemPackages = with pkgs; [
-    clinfo
-    pciutils
-  ];
-}

modules/wm-hyprland.nix

@@ -1,32 +0,0 @@
-{ inputs, pkgs, ... }:
-
-{
-  # Define the Universal Wayland Session Manager.
-  # This will start our compositor.
-  # TODO: Eventually move this to a common desktop module.
-  programs.uwsm = {
-    enable = true;
-    waylandCompositors.hyprland = {
-      prettyName = "Hyprland";
-      comment = "Hyprland compositor managed by UWSM";
-      binPath = "/run/current-system/sw/bin/Hyprland";
-    };
-  };
-
-  programs.hyprland = {
-    enable = true;
-    # Use the packages that we have defined as inputs in our flake.
-    package = inputs.hyprland.packages.${pkgs.stdenv.hostPlatform.system}.hyprland;
-    portalPackage = inputs.hyprland.packages.${pkgs.stdenv.hostPlatform.system}.xdg-desktop-portal-hyprland;
-    # Enable sustemd integration
-    systemd.setPath.enable = true;
-    withUWSM = true;
-    # Enable compatibility with X11 apps
-    xwayland.enable = true;
-  };
-
-  services.hypridle.enable = true;
-
-  # Run a script that launches Hyprland through UWSM on login.
-  services.hyprland-tty-launch.enable = true;
-}