Upgrade to WebPack 5

[spaceninja]

Storybook now supports WebPack 5 with a bit of extra configuration: https://storybook.js.org/docs/react/builders/webpack#webpack-5

We have numerous dependencies we can't update because they depend on WebPack 5, so this would be a good upgrade for us.

[spaceninja]

@calebeby I don't know your availability or how this would prioritize compared to other tasks, but if you had some bandwidth, this would be great to get your eyes on.

[calebeby]

@spaceninja I would guess this is closer to a 5-10 than a 2. I would rather switch to vite if that storybook integration is more stable/complete than it was last time we checked.

[calebeby]

Let's hold off until after launch regardless?

[spaceninja]

For sure, this is a post-launch task.

I'd be thrilled to switch to Vite. Last I checked the blocker wasn't running the Vite integration, it was all the Storybook add-ons we depend on — several didn't run under Vite. But yeah, Vite would be better if we can get things working.

[calebeby]

I'm gonna investigate vite again, see if the ecosystem is more ready than last time we checked. If not, I'll look into webpack 5

[calebeby]

So vite works (really well!!)

Getting twing to work was a big pain (but it was for webpack too), but it works now. I was able to update to the latest twing which is async.

I'm ironing out some minor issues but I am planning to send a PR today hopefully!

[calebeby]

Gonna close this and assign myself to #1403 instead.