Use array types for highlights and emphasis

[sliminality]

Great project! I wish I had something similar when I was debating.

In types.ts, it looks like you're using 1-tuples of 3-tuples to model rich text annotations:

logos-web/lib/types.ts

Line 20 in 21d72af

emphasis: [[number, number, number]],

But from inspecting the API response, it looks like the intent is to model highlights as an array of 3-tuples:

I believe the current types conflate syntax for tuples and arrays:

• T[] or Array<T> denotes an array of T
• [T] denotes a 1-tuple with member T (see TypeScript docs on Arrays)

In this case, it may be more appropriate to model these types as arrays of 3-tuples:

export type Card = {
  …
  body: string[],
  emphasis: [number, number, number][], // or Array<[number, number, number]>
  highlights: [number, number, number][],
  underlines: [number, number, number][],
  cite_emphasis?: [number, number][],
  …
}