Completed initial CAD package guides, tweaked initial code import

app/web/src/helpers/cadPackages/openScad/initialCode.SCAD

@@ -0,0 +1,12 @@
+// involute donut
+
+// ^ first comment is used for download title (i.e "involute-donut.stl")
+
+// Follow the OpenSCAD tutorial: https://learn.cadhub.xyz/docs/
+
+radius=3;
+color(c="DarkGoldenrod")rotate_extrude()translate([20,0])circle(d=30);
+color(c="hotpink")rotate_extrude()translate([20,0])offset(radius)offset(-radius)difference(){
+    circle(d=34);
+    translate([-200,-500])square([500,500]);
+}