add screw holes

ergogen/footprints/hole.js

@@ -0,0 +1,19 @@
+module.exports = {
+  params: {
+    class: "MP",
+    size: 4.0,
+    drill: 2.2  
+  },
+  body: (p) => {
+    return `
+    (module Hole (layer F.Cu) (tedit 5F7666C1)
+      ${p.at /* parametric position */}
+      (fp_text reference "${p.ref}" (at 0 0.5) (layer F.SilkS) ${p.ref_hide}
+        (effects (font (size 1 1) (thickness 0.15)))
+      )
+
+      (pad "" np_thru_hole circle (at 0 0) (size ${p.size} ${p.size}) (drill ${p.drill}) (layers *.Cu *.Mask) (tstamp 75b224f0-3010-4e8c-bf32-f95a770c96d9))
+    )
+    `;
+  },
+};