Brabeast motorized

Yet another version of a Brabeat from Gyrobot,
The replacement leg pins from SLAM-ER work much better than the original ones

I saw the motorized version from DavePlastic and adapted it to the material I had available.

The parts used are :
- [6v 20rpm micromotor 13x14mm](https://www.amazon.fr/gp/product/B081NXMRZ7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1)
- [3.7V battery](https://www.amazon.fr/gp/product/B0CWD4BG3Z/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) and [single battery holder](https://www.amazon.fr/gp/product/B08CY5LC8M/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1)
- [switch](https://www.amazon.fr/gp/product/B07PQH6693/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1)

all the parts fit on top of the original model

There is only glue needed for assembling the switch support and the Battery end to the Cargo plate