Not fully functional yet, so this won't/shouldn't be pushed onto the site yet (no language dropdown, there are still quite a few hardcoded strings that need to become string keys ...) but it works more than well enough to at least test and add more things as string keys that are currently hardcoded.
There are two languages provided, "en-us" and "pirate". Pirate is a test language to make sure all string keys are applying properly and all that.
As a bonus the new I18n system also offers a slightly less boneheaded way to do replacements, which is much more flexible than blind replace calls, and can take any type which is able to be stringified.
The parsing code for this is far from my best work, but it'll do for now, and seems to work okay (and has basic idiot proofing), so eh.
Supersedes #13.
Mostly just for nicity. I did manually clean up a few things, but other than that, this basically was just importing configs from cvm3/crusttest, adding prettier as a dev dependency, and just ctrl-shift-I on every typescript file part of the codebase
