[delta] add a Recursive type arg, avoiding excessive instantiation

[nperez0111]

Idea is that instead of having a whole RecursiveDelta type, add a type arg to a Delta (Recursive=boolean) which can be used to check whether a delta is recursive or not, and then typecheck based on that flag instead of having to construct the whole type. TS doesn't do well with recursive types, since technically this is infinite. It's better to have it check constraints rather than have to build out whole type trees

This code was failing to type-check before:

const $prosemirrorDelta = $delta({ name: s.$string, attrs: s.$record(s.$string, s.$any), text: true, recursive: true })

/**
 * @typedef {s.Unwrap<typeof $prosemirrorDelta>} ProsemirrorDelta
 */

/**
 *
 * @param {ProsemirrorDelta} delta
 */
function prosemirrorDelta (delta) {
  const { children } = delta
  for (const child of children) {
    console.log(child)
  }
}

And, now it can, since we don't use the RecursiveDelta anymore