feat(PABU): cleanup and add deploy helper

hosts/PABU/applications.nix

@@ -0,0 +1,35 @@
+{ pkgs, ... }@inputs: {
+
+  # welcome to nix
+  programs.nix-ld = { enable = true; };
+
+  environment.systemPackages = with pkgs; [
+    # bare essentials
+    git
+    neovim
+    tmux
+    eza
+    expect
+    fzf
+    gum
+    # mason needs stuff
+    gcc
+    clang-tools
+    cargo
+    nodejs_24
+    jdk
+    tree-sitter
+    python3
+    go
+    # mason needs stuff
+    unzip
+    # telescope
+    fzf
+    ripgrep
+    # stuff
+    nixd
+    nixfmt-rfc-style
+    inputs.agenix.packages.x86_64-linux.default
+  ];
+
+}