[Feature]: support native watcher

[hardfist]

What problem does this feature solve?

we currently use watchpack and it has performance issue especially when killed by ctrl-c, it may even take seconds to shutdown, we can progressively migrate watchpack to native watchers

What does the proposed API of configuration look like?

experiments: {
   nativeWatcher: true
}

we can reuse Watch and watchOptions

[ClSlaid]

I don't see any native file wather implementation in rspack, is that already done?

If the watcher does not exist, we can implement that with watch-exec

[hardfist]

I don't see any native file wather implementation in rspack, is that already done?
No, haven't started yet

If the watcher does not exist, we can implement that with watch-exec

yes, watch-exec seems a good choice, but since rspack don't rely on watcher to start new process, maybe use notify directly would be much light and bring small crated size increase

@ClSlaid are you interested in implementing this feature

[ClSlaid]

I'd like to have a look, but I can only proceed with that in my spare time. See if I can implement it in 2 or 3 weeks.

[hardfist]

@ClSlaid take your time, it's not a urgent feature right now