Add missing device category field

[fragsalat]

Hey there,

could you maybe add the category field for NACamDoorTag entities? Those tell me whether it is a door or a window and I can create corresponding entities in homeassistant for that. The data is passed through /homesdata endpoint. Example payload below

{
  id:"xx:xx:xx:yy:yy:yy:"
  type:"NACamDoorTag"
  name:"Terassentür"
  setup_date:1639423483
  bridge:"xx:xx:xx:yy:yy:yy"
  category:"door"
}
{
  id:"xx:xx:xx:yy:yy:yy"
  type:"NACamDoorTag"
  name:"Fenster Wohnzimmer"
  setup_date:1639424076
  bridge:"xx:xx:xx:yy:yy:yy"
  category:"window"
}

Currently a device_category exists but this is derived from the type and in case of NACamDoorTag it is OPENING. Do be backward compatible you could simply pass the field category from the raw data or just store the raw data and let people access it.

Thanks for your support and the good library.