nix: Add host polder and refractor modules

nixcfgs/modules/nixos/core/configuration.nix

@@ -0,0 +1,43 @@
+{
+  config,
+  pkgs,
+  ...
+}: {
+
+  # Select internationalisation properties.
+  i18n = {
+    defaultLocale = "en_GB.UTF-8";
+    extraLocales = [
+      "en_GB.UTF-8/UTF-8"
+    ];
+    extraLocaleSettings = {
+      # LC_CTYPE = "en_GB.UTF-8";
+      LC_ALL = "en_GB.UTF-8";
+    };
+  };
+
+  environment.shellAliases = {
+    nrs = "sudo nixos-rebuild switch --flake ~/.dotfiles/nixcfgs";
+  };
+
+  # system.copySystemConfiguration = true;
+  nix.settings.experimental-features = [
+    "nix-command"
+    "flakes"
+  ];
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.js0ny = {
+    isNormalUser = true;
+    extraGroups = [
+      "wheel"
+      "docker"
+      "libvirtd"
+      "dialout"
+    ]; # Enable ‘sudo’ for the user.
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJToUo2jT3qt7eHIME9e1awabZZVmtKhbxwVz9BMSM2d js0ny@zephyrus"
+    ];
+  };
+  programs.command-not-found.enable = true;
+}

nixcfgs/modules/nixos/core/packages.nix

@@ -0,0 +1,15 @@
+# ~/.config/nix-config/common/packages-headless.nix
+{pkgs, ...}: {
+  environment.systemPackages = with pkgs; [
+    vim
+    wget
+    curl
+    git
+    tmux
+    nix-index
+    file
+    unzip
+    zip
+    pkg-config
+  ];
+}