Update code to run heavy synchronous processes inside Workers

[SystemDisc]

I'd like to revisit this project and make it more performant by running synchronous computations in Worker threads and posting messages back to the main thread to populate the buffer. I think I'd also like to have a Worker thread dedicated to playing audio from the buffer. Hopefully, this will reduce stuttering. I don't know when I'll have time to work on this, so if anyone wants to try it out, by all means, feel free.

I'd also like to make sure no superfluous dependencies are required, and that all dependencies are updated and have no associated security advisories.