feature(packages): add system packages module

modules/nixos/packages.nix

@@ -0,0 +1,50 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # system packges
+  environment.systemPackages = with pkgs; [
+    alacritty
+    btop
+    cowsay
+    dnsutils
+    ethtool
+    file
+    ghostty
+    git
+    gnupg
+    imagemagick
+    imv
+    iperf3
+    jq
+    kdePackages.qtmultimedia
+    kitty
+    ldns
+    lm_sensors
+    lsof
+    ltrace
+    mtr
+    neovim
+    nh
+    nix-output-monitor
+    nmap
+    nvd
+    p7zip
+    pciutils
+    sddm-astronaut
+    socat
+    strace
+    sysstat
+    tree
+    unzip
+    usbutils
+    vim
+    wget
+    which
+    xz
+    zip
+    zstd
+  ];
+
+  # browser
+  programs.firefox.enable = true;
+}