feat: move to node:fs/promises

[43081j]

Moves to using node:fs/promises rather than using promisify manually.

[43081j]

going to try fix this pesky windows failure while im in here 👍 lets not merge until i have, or i've given up 😂

[paulmillr]

@43081j can we make a list of whats needed for v4 in your opinion?

i want to ditch v3 bc i’m tired of ppl reporting “vulnerabilities”

[43081j]

@paulmillr sure ill try find some time this week to list whats left

the main blocker is this windows test, which im on the verge of fixing. almost certainly a timing issue in tests rather than anything wrong with the source

i can at least recreate it locally now, so will get around to fixing it eventually 👍

off the top of my head, the TLDR of whats left:

• fix this windows test failure (whether it be a test problem or an actual bug)
• start testing usage of it in some large projects (storybook, vite, maybe)
• leave readdirp for now, moving to node's own recursive: true can happen another time

[paulmillr]

ok let's prepare for the release later this week.