Add motor examples to documentation website

[FDelporte]

Extend the page https://pi4j.com/documentation/device-examples/ referring to examples of CrowPi

Discussed in Pi4J/pi4j#227

^{Originally posted by rezza72 June 12, 2022}
Hello
I want to control a motor using a Raspberry Pi.
As I searched, all projects are for pi4j v1.0.
I'll be grateful if you guide me.
Thanks in advance.