Add example

examples/print_keycaps_on_their_side.scad

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+include <../includes.scad>
+
+/* Printing keycaps on their side is an easy way to get a nice, smooth top
+   surface, with some caveats:
+   1. one of the sides won't look as good as the other
+   2. any amount of top tilt makes the sides of the keycap not flat, so we have
+      to force them to be flat by making the keytop a trapezoid
+
+  sideways() does the magic for you.
+
+  Note that this won't work at all with side sculpted keycaps, skin_shape_hull,
+  and double sculpted aka full sculpted keycaps either. Getting it to work with
+  skin_shape_hull is the easiest, getting it to work with full sculpting is a
+  lot harder, and side sculpting is obviously impossible by nature
+*/
+
+legends = ["F1", "1", "q", "a", "z"];
+for (x = [0:4]) {
+  translate_u(0,-x) dcs_row(x) sideways() front_legend(legends[x], size=5) {
+    $stem_support_type = "disable";
+    $dish_type = "disable";
+
+    /* $top_tilt = 30; */
+    union() {
+      key();
+    }
+  }
+}