feat: package winapps & the winapps launcher using nix

doc: document installation using Nix

fix: explicitely specify path to inquirer

fix: libvirt group is called libvirtd on nix

fix: set libvirturl for winapps-launcher

fix: refine group change sed expr

feat: add desktop file

fix: do not use source derivation

fix: use install instead of cp

fix: ensure  exists

packages/winapps-launcher/default.nix

@@ -0,0 +1,66 @@
+{
+  stdenv,
+  lib,
+  fetchFromGitHub,
+  makeWrapper,
+  makeDesktopItem,
+  callPackage,
+  yad,
+  ...
+}: let
+  rev = "eaa660d39bf3f49b136c98c87c35e3e12f118f8f";
+  hash = "sha256-7lkx/O4dOdVqAPX6s2IkkM6Ggbzmz9sm++20BBeoUQ4=";
+in
+  stdenv.mkDerivation rec {
+    pname = "winapps-launcher";
+    version = "git+${rev}";
+
+    src = fetchFromGitHub {
+      owner = "winapps-org";
+      repo = "WinApps-Launcher";
+
+      inherit rev hash;
+    };
+
+    nativeBuildInputs = [makeWrapper];
+    buildInputs = [yad (callPackage ../winapps {})];
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out
+      cp -r ./Icons $out/Icons
+
+      sed -E -i \
+        -e "$(printf "%s$out%s" 's|^declare -rx ICONS_PATH="./Icons"|declare -rx ICONS_PATH="' '/Icons"|')" \
+        WinAppsLauncher.sh
+
+      install -m755 -D WinAppsLauncher.sh $out/bin/winapps-launcher
+      install -Dm444 -T Icons/AppIcon.svg $out/share/pixmaps/winapps.svg
+
+      wrapProgram $out/bin/winapps-launcher \
+        --set LIBVIRT_DEFAULT_URI "qemu:///system" \
+        --prefix PATH : "${lib.makeBinPath buildInputs}"
+
+      runHook postInstall
+    '';
+
+    desktopItems = [
+      (makeDesktopItem {
+        name = "winapps";
+        exec = "winapps-launcher";
+        icon = "winapps";
+        comment = meta.description;
+        desktopName = "WinApps";
+        categories = ["Utility"];
+      })
+    ];
+
+    meta = with lib; {
+      homepage = "https://github.com/winapps-org/WinApps-Launcher";
+      description = "Graphical launcher for WinApps. Run Windows applications (including Microsoft 365 and Adobe Creative Cloud) on GNU/Linux with KDE, GNOME or XFCE, integrated seamlessly as if they were native to the OS. Wayland is currently unsupported.";
+      mainProgram = "winapps-launcher";
+      platforms = platforms.linux;
+      license = licenses.gpl3;
+    };
+  }