I finally implemented (or better yet connected) mixing ingredients over UI.

Also I fixed some bugs and annoyances, now I want to refine the mixing process based on a few rules:
-a solid and a powder don't mix
-if one of the items is a solid, the depiction of the other ingredient should be used

cha-cha-cha-changes:
https://github.com/Papiertig0r/Alchemy/commit/f7647a8f72ef8be638d19303c27b82f16e140a68

I'm not proud of today, I got way less done that I could have but hey, that's shitty architecture xD

Now you can grey stuff out, if it is not compatible with the ingredient you want to mix it with.

I now need to connect the mixing logic with the actual mixing ui. Then I need to abstract it to be able to use the same system with e.g. applying poison to a blade or buffs to an armor.