Add info about hardware product

https://forum.fhem.de/index.php/topic,67368.msg930028.html#msg930028

```
"x_product": {
"vendor": {
"Stark Industries": {
"web": "https://www.starkindustries.com",
"mailto": "contact@starkindustries.com",
"support_commercial": {
"mailto": "support@example.com",
"title": "Stark Support Team",
"web": "https://support.starkindustries.com"
},
"support_community": {
"title": "Stark Community Support",
"web": "https://forum.starkindustries.com"
}
}
},
"api": {
"cloudfree": true,
"openapi": true,
"web": "https://developer.starkindustries.com",
"protocols": {
"MQTT": {
"proprietary": false,
"discoverable": true
}
}
},
"types": {
"typeA": {
"subTypes": {
}
}
},
"models": {
}
}
```