feat: Unify lxc and systems config

sw/headless/programs.nix

@@ -0,0 +1,36 @@
+{
+  config,
+  lib,
+  pkgs,
+  inputs,
+  ...
+}:
+
+with lib;
+
+let
+  cfg = config.modules.sw;
+  basePackages = with pkgs; [
+    uv
+    perl
+    openssh
+    ncurses
+    tmux
+    htop
+    binutils
+    man
+    git
+    oh-my-posh
+    zsh
+    lm_sensors
+  ];
+in
+{
+  environment.systemPackages = subtractLists cfg.excludePackages (basePackages ++ cfg.extraPackages);
+
+  programs.mtr.enable = true;
+  programs.gnupg.agent = {
+    enable = true;
+    enableSSHSupport = true;
+  };
+}