Beer that looks like beer

[Ikea]

I once made an abandoned pr that visually had different states of matter layer on top of each other while in beakers, to add beer foam I think it'd make sense for it to be by a more robust version of that. Code the system to where you can have chems have different layers in containers based mostly off of state of matter. Also add a "don't visually mix with other chems" var and a "change the default positioning (ie gas on bottom)" var so you can have stuff like a visually distinct liquid beer foam chem which goes on top of liquids that occurs when you dispense beer or a solid on top of gas ie frobscottle. I have no intents on coding this but if anyone wants to look at my admittedly messy code and pick it up please do

https://github.com/goonstation/goonstation/pull/15675