Open sources the rotisserie / spinning drying jig

Fixes #63

experimental/rotisserie/README.md

@@ -0,0 +1,12 @@
+![Photo of the rotisserie with three b-parasites attached](./rotisserie.jpg)
+
+This is a silly attempt of making an automatic spinning jig. Don't take it too seriously - there are probably many easier, less dramatic ways to achieve the same results.
+
+## Parts
+| Part                      | Example                                                             |
+|---------------------------|---------------------------------------------------------------------|
+| DC motor - 12V, 60 rpm    | [Aliexpress](https://www.aliexpress.com/item/32987942205.html)      |
+| PWM speed controller      | [Aliexpress](https://www.aliexpress.com/item/33005893596.html)      |
+| 12V power supply          | [Aliexpress](https://www.aliexpress.com/item/32798499158.html)      |
+| Power supply female jack  | [Aliexpress](https://www.aliexpress.com/item/1005004763316462.html) |
+| M3 screws, washers & nuts | [Aliexpress](https://www.aliexpress.com/item/1005001975621423.html) |