Aquariums

[obiwac]

Resolves #33
Also see inobulles/aquarium#48

To do:

• AquariumBuilder class.
• Aquarium class.
• Preemptive check for if aquariums are installed, so we don't run any of the build steps (can just do a list command and see if that fails ig).
• Put the aquarium Bob stuff in bob.aquarium I guess.
• Look through TODO's in added code cuh I'm pretty sure there's a bunch of important stuff I forgot.
• Figure out where to put root.img and esp.img temporary artifacts (should aquariums just be responsible for these and put them in /usr/local/aquarium somewhere?).
• Find an elegant way to output artifacts, like bob out bootable.img or something, and an out value which just takes in a cookie you wanna use (probably in it's own PR before this one). Alternatively, I could have an "artifacts" system with an artifacts map.
• Update the VERSION #define and maybe add a CI check for this.

It's infeasible to do tests on this in Bob. But since I want all aquariums to move to being built by Bob, tests for aquariums will naturally test for the Bob implementation too (I wonder if there's a standard way to trigger CI on other projects dependant projects? because then this could be automated).