/**
 * A type that represents a deeply readonly object. This is similar to
 * TypeScript's `Readonly` type, but it recursively applies the `readonly`
 * modifier to all properties of an object and all elements of arrays.
 */
export type DeepReadonly<T> = T extends (infer R)[]
  ? ReadonlyArray<DeepReadonly<R>>
  : T extends object
    ? {
        readonly [K in keyof T]: DeepReadonly<T[K]>
      }
    : T