Consider using watchman

[mominul]

https://facebook.github.io/watchman/
https://github.com/facebook/watchman
https://crates.io/crates/watchman_client

[kiljacken]

Not too useful an issue text, but thanks anyway!

We've actually already sorta decided to re-structure the vfs design to be more like watchman, as the design seems a lot nices, and then use watchman for watching (if applicable). Nobody has gotten that far yet though, but it is on the roadmap.

[mominul]

@kiljacken Sorry, I had intended to include relevant discussions happened on zulip but I posted it beforehand! 😣

I'll add those zulip threads, after I get those permalinks.