fix: auto run executePendingJobs

[Holly-at-evg]

there no need to manually execute executePendingJobs method, in https://github.com/justjake/quickjs-emscripten/?tab=readme-ov-file#promises, the author provide a way that can trigger on the promise is resolved using "promise.settled.then(vm.runtime.executePendingJobs)"

const vm = QuickJS.newContext()
const fakeFileSystem = new Map([["example.txt", "Example file content"]])

// Function that simulates reading data asynchronously
const readFileHandle = vm.newFunction("readFile", (pathHandle) => {
  const path = vm.getString(pathHandle)
  const promise = vm.newPromise()
  setTimeout(() => {
    const content = fakeFileSystem.get(path)
    promise.resolve(vm.newString(content || ""))
  }, 100)
  // IMPORTANT: Once you resolve an async action inside QuickJS,
  // call runtime.executePendingJobs() to run any code that was
  // waiting on the promise or callback.
  promise.settled.then(vm.runtime.executePendingJobs)
  return promise.handle
})
readFileHandle.consume((handle) => vm.setProp(vm.global, "readFile", handle))

// Evaluate code that uses `readFile`, which returns a promise
const result = vm.evalCode(`(async () => {
  const content = await readFile('example.txt')
  return content.toUpperCase()
})()`)
const promiseHandle = vm.unwrapResult(result)

// Convert the promise handle into a native promise and await it.
// If code like this deadlocks, make sure you are calling
// runtime.executePendingJobs appropriately.
const resolvedResult = await vm.resolvePromise(promiseHandle)
promiseHandle.dispose()
const resolvedHandle = vm.unwrapResult(resolvedResult)
console.log("Result:", vm.getString(resolvedHandle))
resolvedHandle.dispose()

[Pkcarreno]

I think this could help to solve #32

Edit:
I did a quick review and did not contemplate certain things:

• AsyncArena, BigInt and ArrayBuffer additions are cool, but I think they are outside the scope of the initial PR. So it should be a new PR
• In the changes, there are important modifications to note, such as changing the package name (which shouldn't go) as well as changing the version number. And some other comments that should not be there to avoid future misunderstandings
• The addition of AsyncArena is the one that should solve Doesn't work with asyncify #32