Add Pixieditor module

modules/core/packages/packages.nix

@@ -43,6 +43,7 @@
     distrobox = [distrobox pkgs.boxbuddy];
     winboat = [winboat freerdp];
     signal = signal-desktop;
+    pixieditor = pixieditor;
   };
 in {
   imports = builtins.attrValues (builtins.mapAttrs mkPackage packages);