FIX bundler parsing error should not panic

[Charlie-XIAO]

Fixes #9.

This PR attempts to emit the parsing error in a formatted way instead of panicking (which is clearly wrong). The rendered error message of the reproducer in #9 should now look like this (no color, but formatted):

I've also added a corresponding widget to test-widgets.

/cc @Xinyu-Li-123 Can you give a review and confirm if this works?

[Xinyu-Li-123]

I have tested your changes locally. It works for other bugs, but Deskulpt still crashes if there are duplicated export default statements. Below is a minimal example to reproduce this crash

const React = window.__DESKULPT__.defaultDeps.React;
const options = {
  year: "numeric",
  month: "short",
  day: "numeric",
  hour: "numeric",
  minute: "numeric",
};


function Clock() {
  const [time, setTime] = React.useState(new Date().toLocaleString("en", options));

  function updateTime() {
    setTime(new Date().toLocaleTimeString("en", options));
  }
  setInterval(updateTime, 10000);

  return <h3>{time}</h3>;
}

const FOO = 1;
export default FOO;

export default {
  render: () => <Clock />,
};

The error message is as follows

thread 'main' panicked at C:\Users\Eiger\.cargo\registry\src\index.crates.io-6f17d22bba15001f\swc_bundler-0.225.17\src\inline.rs:49:13:
internal error: entered unreachable code: Multiple identifiers equivalent up to span hygiene found: default#8        
First = default#5
Second = default#5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
[0408/132929.720:ERROR:window_impl.cc(121)] Failed to unregister class Chrome_WidgetWin_0. Error = 0

[Charlie-XIAO]

This is not the same issue: this one is an internal SWC error that cannot be recovered :(

[Xinyu-Li-123]

So should we merge this pr but open a new issue about this bug?

[Charlie-XIAO]

I opened swc-project/swc#8824 upstream. Hopefully it will get fixed there, and a simple update of dependencies will fix the issue. AFAIK this PR should not be blocked by that.

[Xinyu-Li-123]

This PR fixes the bug that Deskulpt will crash once there is a syntax error in widget source code.