Add heightwidth script

modules2/hosts/t480/heightwidth.nix

@@ -0,0 +1,18 @@
+{
+  flake.modules.nixos.pc =
+    { pkgs, ... }:
+    {
+      environment.systemPackages = [
+        (pkgs.writeShellApplication {
+          name = "heightwidth";
+
+          runtimeInputs = [ pkgs.ffmpeg ];
+
+          # https://github.com/rwxrob/dot/blob/main/scripts/heightwidth.
+          text = ''
+            ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of default=noprint_wrappers=1 "$1"
+          '';
+        })
+      ];
+    };
+}