feat: add nixos configuration

nixos/modules/packages/default.nix

@@ -0,0 +1,10 @@
+{ ... }:
+
+{
+  imports = [
+    ./desktop.nix
+    ./development.nix
+    ./shell.nix
+    ./utilities.nix
+  ];
+}

nixos/modules/packages/desktop.nix

@@ -0,0 +1,16 @@
+{ pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    adwaita-icon-theme
+    firefox
+    grim
+    hyprpaper
+    kitty
+    mako
+    slurp
+    waybar
+    wl-clipboard
+    wofi
+  ];
+}

nixos/modules/packages/development.nix

@@ -0,0 +1,29 @@
+{ codexPkgs, pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    clang
+    cmake
+    codexPkgs.codex
+    gcc
+    git
+    gitui
+    meson
+    neovim
+    ninja
+    tree-sitter
+    vim
+  ];
+
+  systemd.user.services.codex-background-server = {
+    description = "Codex background app server";
+    wantedBy = [ "default.target" ];
+    unitConfig.ConditionUser = "hhhh";
+    serviceConfig = {
+      ExecStart = "/run/current-system/sw/bin/codex app-server --listen unix://";
+      WorkingDirectory = "%h";
+      Restart = "on-failure";
+      RestartSec = 3;
+    };
+  };
+}

nixos/modules/packages/shell.nix

@@ -0,0 +1,17 @@
+{ pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    atuin
+    blesh
+    direnv
+    eza
+    fd
+    fzf
+    ripgrep
+    starship
+    zoxide
+  ];
+
+  environment.etc."blesh/ble.sh".source = "${pkgs.blesh}/share/blesh/ble.sh";
+}

nixos/modules/packages/utilities.nix

@@ -0,0 +1,11 @@
+{ pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    curl
+    tree
+    unzip
+    wget
+    zip
+  ];
+}