WGU prep: Windows VM setup, trackpad/trackpoint tweaks, aliases

- Add WGU Windows VM helper script + virtualization module (KVM/libvirt)
- Fix create-wgu-vn: mkdir before use, CPU topology, detect OS variant
- Add Webex, ZapZap, qalculate-gtk, libqalculate, tigervnc packages
- Add n97-mini VNC alias, switch nr to local flake path
- Tune trackpad (0.44) and TrackPoint (160/120) sensitivity
- Reduce mouse sensitivity to -0.2
- Move zapzap from desktop.nix alphabetically
- Remove OVMFFull from virtualisation (handled by swtpm/OVMF default)
- Bump flake inputs (home-manager, nixos-hardware, nixpkgs, pi-mono)

flake.nix

@@ -31,6 +31,7 @@
         home-manager.nixosModules.home-manager
         ./modules/laptop.nix
         ./modules/hyprland.nix
+        ./modules/virtualization.nix
         ./modules/t490.nix
         nixos-hardware.nixosModules.lenovo-thinkpad-t490
         { nixpkgs.config.allowUnfree = true; }