Feature Request: Compile TypeScript to Node-API addon, without node-gyp

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Thanks for bringing this great project!

I wonder if TypeScript can be compiled to native addons without C and node-gyp wrapper. Currently scriptc does not support ffi in dylib mode.

Maybe 2 optional approach?

Auto binding (so cool)

export function add(a: number, b: number): number {
  return a + b
}

const { add } = require('./add.node')

Direct Node-API call (I have tried but failed)

declare function napi_get_cb_info(/* ... */): number
declare function napi_create_function(/* ... */): number
declare function napi_create_double(/* ... */): number

function add(env: number, info: number): number {
  /* napi_get_cb_info(env, info, ...) */
  const ret = argv[0] + argv[1]
  /* napi_create_double(env, ret, addressOf(napiValueRet)) */
  return napiValueRet
}

export function napi_register_module_v1(env: number, exports: number): number {
  let fn: number /* ... */
  napi_create_function(env, /* ... */, add, 0, addressOf(fn))
  return fn
}

const add = require('./add.node')

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