feat(handy): package Handy for Nix

packages/handy.nix

@@ -0,0 +1,23 @@
+{
+  appimageTools,
+  fetchurl,
+  lib,
+}: let
+  name = "Handy";
+  pname = lib.strings.toLower name;
+  version = "0.7.6";
+  src = fetchurl {
+    url = "https://github.com/cjpais/${name}/releases/download/v${version}/${name}_${version}_amd64.AppImage";
+    hash = "sha256-UZNt3lfKo6dBRWK1YD03HmcZsx/Zu2J3eD5VdTw+poU=";
+  };
+  appimageContent = appimageTools.extractType2 {inherit pname version src;};
+in
+  appimageTools.wrapType2 {
+    inherit pname version src;
+    extraPkgs = pkgs: [pkgs.wtype];
+    extraInstallCommands = ''
+      install -m 444 -D ${appimageContent}/${name}.desktop $out/share/applications/${name}.desktop
+      install -m 444 -D ${appimageContent}/${name}.png $out/share/icons/hicolor/256x256/apps/${name}.png
+      install -m 444 -D ${appimageContent}/${pname}.png $out/share/icons/hicolor/256x256/apps/${pname}.png
+    '';
+  }