feat: add which-nix script

modules/profiles/base.nix

@@ -32,6 +32,17 @@ let
     '';
   };
 
+  which-nix = pkgs.writeFishApplication {
+    name = "which-nix";
+    runtimeInputs = with pkgs; [ which coreutils-full ];
+    text = /* fish */ ''
+      readlink -f (which $argv)
+    '';
+    completions = /* fish */ ''
+      complete -c which-nix -fa '(__fish_complete_command)'
+    '';
+  };
+
   gi = pkgs.writeFishApplication
     {
       name = "gi";
@@ -139,11 +150,12 @@ in
     (nom-system-command "nixos-boot" "sudo nixos-rebuild boot --flake ~/.dotfiles")
     (nom-system-command "nixos-switch" "sudo nixos-rebuild switch --flake ~/.dotfiles")
     comma
+    manix
     nix-index
+    nix-output-monitor
     nixpkgs-fmt
     statix
-    manix
-    nix-output-monitor
+    which-nix
 
     # other
     bat