feat(build123d): make the first working version of the build123d template

build123d/template/build3d.py

@@ -0,0 +1,8 @@
+from build123d import *  # pyright: ignore[reportWildcardImportFromLibrary]
+
+length, width, thickness = 80.0, 60.0, 10.0
+
+with BuildPart() as builder:
+    Box(length, width, thickness)
+
+export_step(builder.part, "output.step")

build123d/template/flake.nix

@@ -28,10 +28,9 @@
       perSystem = {pkgs, ...}: {
         krantz.build123d = {
           enable = true;
-          # src = ./.;
 
-          # runtimeDeps = with pkgs; [];
-          # buildDeps = with pkgs; [];
+          objectName = "box";
+          builder = ./build3d.py;
         };
       };
     };