Add xwacomcalibrate as package

packages/xwacomcalibrate/default.nix

@@ -0,0 +1,27 @@
+{
+  # Snowfall Lib provides a customized `lib` instance with access to your flake's library
+  # as well as the libraries available from your flake's inputs.
+  lib,
+  # You also have access to your flake's inputs.
+  inputs,
+
+  # All other arguments come from NixPkgs. You can use `pkgs` to pull packages or helpers
+  # programmatically or you may add the named attributes as arguments here.
+  pkgs,
+  stdenv,
+  ...
+}:
+
+pkgs.writeShellApplication {
+  name = "xwacomcalibrate";
+
+  runtimeInputs = with pkgs; [
+    xf86_input_wacom
+    xorg.xwininfo
+    xorg.xrandr
+    xdotool
+    bc
+  ];
+
+  text = ./xwacomcalibrate.sh;
+}