Consider disabling `typescript/no-use-before-define` for `typedefs`

[yokuze]

In TypeScript, type definitions are hoisted, so it is valid to reference a type that is declared later on in the file. We may want to allow this so that we can organize the types in a given file hierarchically. For example:

export type TheMainPointOfThisFile = DogOrCat | LiteralDogOrCat;

type DogOrCat = EitherThis | OrThis;
type LiteralDogOrCat = 'cat' | 'dog';

interface EitherThis {
   isADog: boolean;
}

interface OrThis {
   isACat: boolean;
}