feat(PABU): cleanup and add deploy helper

hosts/PABU/default.nix

@@ -1,71 +1,9 @@
-{ lib, pkgs, modulesPath, ... }@inputs: {
-  imports = [ (modulesPath + "/profiles/minimal.nix") ];
-
-  # Installing a new system within the nspawn means that the /sbin/init script
-  # just needs to be updated, as there is no bootloader.
-  system.build.installBootLoader = pkgs.writeScript "install-sbin-init.sh" ''
-    #!${pkgs.runtimeShell}
-    ${pkgs.coreutils}/bin/ln -fs "$1/init" /sbin/init
-  '';
-
-  system.activationScripts.installInitScript = lib.mkForce ''
-    ${pkgs.coreutils}/bin/ln -fs $systemConfig/init /sbin/init
-  '';
-
-  boot.isContainer = true;
-  networking.hostName = "PABU";
-
-  nix = {
-    settings = {
-      experimental-features = [ "nix-command" "flakes" ];
-      auto-optimise-store = true;
-    };
-  };
-
-  users.groups.gandalf = { gid = 1000; };
-
-  users.users.gandalf = {
-    isNormalUser = true;
-    home = "/home/gandalf";
-    createHome = true;
-    group = "gandalf";
-    extraGroups = [ "wheel" ];
-  };
-
-  security.sudo.wheelNeedsPassword = false;
-
-  # welcome to nix
-  programs.nix-ld = { enable = true; };
-
-  environment.systemPackages = with pkgs; [
-
-    # bare essentials
-    git
-    neovim
-
-    # mason needs stuff
-    gcc
-    clang-tools
-    cargo
-    nodejs_24
-    jdk
-    tree-sitter
-    python3
-    go
-
-    # mason needs stuff
-    unzip
-
-    # telescope
-    fzf
-    ripgrep
-
-    # stuff
-    nixfmt-rfc-style
-
-    inputs.agenix.packages.x86_64-linux.default
-
+{ modulesPath, ... }: {
+  imports = [
+    (modulesPath + "/profiles/minimal.nix")
+    ./applications.nix
+    ./network.nix
+    ./system.nix
+    ./user.nix
   ];
-
-  system.stateVersion = "24.05";
 }