Clean up child processes when exiting for any reason

[ds300]

We can probably copy what yarn 2 does here: https://github.com/yarnpkg/berry/blob/cb2eecc859145235dcab6e338b264069c64ba027/packages/yarnpkg-shell/sources/pipe.ts#L28

i.e. keep a reference to any spawned process and make sure they get cleaned up on sigterm and whatever else

[Yuvraj102]

hello @ds300, I'm interested in solving this issue, Please assign it to me.

[ds300]

All yours!

[ds300]

@Yuvraj102 I'm assuming work has stalled on your side, so let me know if you still want to do this, otherwise I'll open it up to other folks soon. Thanks 👍

[Yuvraj102]

Hello @ds300, I'm looking into it, Havent made any commits yet, But I'm still interested in this, Will definitely reach out with some questions soon
Thanks

[Yuvraj102]

I'll definitely try to close this within a week, Apologies for the delay.

[ds300]

All good, no rush! I appreciate the help :)