Extend labels with an emoji and optionally also a short version

[Philipp000]

In the eat-api Website and the Apps, there were defined lists for the ingredients with custom emojis, to display instead of the longer names.
I would propose to add these to the labels.json as well, to save the doubled amount of work, oposed to handle these lists in every application by itself.

Further, I would also propose to add a short version, abbreviation or something for labels, where there exists no emoji. As it would be easier to display these, instead of the enum Labels. Example: BAVARIA can be GQB.

[COM8]

I agree with you in both points.