Find a way to replace eslint + prettier

[joepio]

I strongly dislike having two tools that could disagree on formatting. Doesn't play nice with Zed either. Eslint itself is insanly slow and needs a lot of config. Also, our eslint config is outdated.

But we also rely on a bunch of extensions, and we have a svelte project in the repo too.

Keep using eslint

• We already have the configs
• slow
• lots of rules & config

Biome

• Fast
• No plugin hell
• Sveltekit and react-compiler support lacking now

OXC

• Does linting (oxlint, which just hit 1.0) + compiling
• Vite is planning on using this for all (react) compilation, as it's way faster with updates.
• does support plugins / custom rules more than
• No formatting support yet, but they're working on a formatter and are planning to port prettier. However, there is a prettier plugin fox oxc.
• Linting rules are kinda lacking as of now, no external plugin support, and no plan yet for eslint-plugin-react-compiler or svelte