SF-2986 Add step to confirm language codes before generating draft

[Nateowami]

@josephmyers There are two designs here. One is based on a grid with three quadrants filled, and one is based on two rows, with the first row having a right and left. I like the concept @josephmyers came up with, but I also feel like the layout it produces is harder to understand. The structure of the page doesn't seem as clear to me. It's like there's just a bunch of text floating around and it's hard to tell what is associated with what. Feel free to fork this and propose changes.

Below screenshots are outdated

Implementation of Balsamiq mockup

Other concept that I worked on (on this branch, one commit behind the current tip of this branch)

---

This change is 

[josephmyers]

Thanks for poking me on this. I've made a new branch off this one with my layout touchups. I think the core here is excellent, but I tweaked the sizing, colors, and other styles for various items to better visually organize it. They are all aesthetic tweaks, I think, except that I did remove the descriptions. I found them to clutter up the page, but I understand that there may in fact be a need for them, though they're not in the accepted mockup. If you do want to maintain descriptions, we should limit them to two, one just above each gray box.

Finally, about the wording, I was wondering if we'll run into localization problems with "Drafting from," as you mentioned for my "Scripture Forge will be trained that..." If we could improve this wording at all, that'd be great, though I don't want to hold things up too long. I think that the use of "language model" in the first step is isolated and a little obscure, but we may be able to mitigate that by reusing the term here?

Reviewable status: 0 of 8 files reviewed, all discussions resolved

[Nateowami]

@josephmyers I've incorporated your changes and cleaned things up, as well as adding some new ideas. Here's what it looks like now, in French:

[josephmyers]

Yeah, this looks solid.

Reviewed 1 of 7 files at r2, all commit messages.
Reviewable status: 1 of 8 files reviewed, all discussions resolved