feat(PABU): setup nix development environment

hosts/PABU/default.nix

@@ -22,9 +22,7 @@
     };
   };
 
-  users.groups.gandalf = {
-    gid = 1000;
-  };
+  users.groups.gandalf = { gid = 1000; };
 
   users.users.gandalf = {
     isNormalUser = true;
@@ -36,7 +34,25 @@
 
   security.sudo.wheelNeedsPassword = false;
 
-  environment.systemPackages = with pkgs; [ git neovim ];
+  programs.nix-ld = { enable = true; };
+
+  environment.systemPackages = with pkgs; [
+
+    git
+    neovim
+
+    gcc
+    clang-tools
+    cargo
+    nodejs_24
+    jdk
+    tree-sitter
+    python3
+    go
+
+    unzip
+
+  ];
 
   system.stateVersion = "24.05";
 }