Lavish livestock address review comments

[runcows]

• removed the CSV file in favor of just having the list in generate.py
• adds basic guidebook
• addresses the remaining review comments

[Bloo-dev]

I don't think removing the .csv is a good idea. It is true that the csv does not add any functionality, nor is it technically required.
However, for a non-code-savvy person it is way easier to edit a .csv, especially since it is in a well known directory, than to have dig through .py files until they find where the supported animals are defined. It does not cost us anything to have the .csv but adds clarity.

[runcows]

I actually firmly disagree.

I think the CSV was actually more buried and less friendly since it was in the raw folder. If I were a less code savvy person, unfamiliar with our code base, I'd first check data, but see nothing, then see a file called generate and check there. Separating the CSV then adds a 3rd place to check, which you'd only find if you can read the python CSV reading or just check everywhere out of frustration.

[runcows]

I can change it back to the CSV if that's desired, but I do disagree. Not enough to die on this hill and stall this PR longer than needed though 😅

[EpyonProjects]

To be fair, we do have a lot of single lists within code and not separated. I don't know if we have a single column CSV anywhere and it does look weird to me, to be in a CSV rather than a format that accepts a simple list (of like 6 or 7 entries too, which is not much)

The raw folder is very confusing to me, I always pass it when browsing the codebase