Reorganize model files

models/justfile

@@ -0,0 +1,16 @@
+parts := "cartridge receptacle"
+
+default: build
+
+build:
+	#!/bin/sh
+	for part in {{parts}}; do
+		echo "Rendering $part..."
+		just render-part $part
+	done
+
+render-part part:
+	#!/bin/sh
+	echo 'use <{{part}}.scad>; $fn = 128; {{part}}();' > part.scad
+	openscad --backend Manifold -o {{part}}.stl part.scad
+	rm part.scad