Feature Request: 'Unit' as product attribute.

[saya6k]

Now in sensor.grocy_stock, I can't get product attribute 'unit'.

Having quantity without unit, it's very confusing since in grocery, nothing is in standardized amount.
Having at least default unit as attribute, it will be easier to decide how much should I call service to add, consume, open product to grocy.

I wish I have grocy product unit in home assistant. Thanks.