chore(eslint): migrate to oxlint, oxfmt

[Kenzo-Wada]

What is it?

• Infra

Description

Migrate from ESLint + Prettier to OxLint + OxFmt for faster linting and formatting.

Changes

• Linting: Replace ESLint with OxLint (eslint-plugin-qwik rules remain via oxlint config)
• Formatting: Replace Prettier with OxFmt (experimentalPrettierFallback for md/json/yaml)
• Remove: eslint, prettier, prettier-plugin-jsdoc, prettier-plugin-tailwindcss, pretty-quick
• Add: oxlint, oxfmt

Benchmark (no cache)

Command	main	This PR	Improvement
pnpm lint	48s	11.5s	4.2x
pnpm fmt	31s	12s	2.6x

Checklist

• My code follows the developer guidelines of this project
• I performed a self-review of my own code
• I added a changeset with pnpm change
• I made corresponding changes to the Qwik docs
• I added new tests to cover the fix / functionality

[changeset-bot]

⚠️ No Changeset found

Latest commit: 6a228ce

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[gioboa]

Thanks for your help @Kenzo-Wada
Can I ask you to resolve the conflicts please?

[wmertens]

@Kenzo-Wada ideally you add a commit with just the configuration, then a commit with the result of running lint, and commits before/after with manual fixes if any are needed.

That way conflicts are easy to handle

[Kenzo-Wada]

@wmertens @gioboa Got it, I'll do that first!
Sorry, reviewers have it rough right now. My bad for not thinking of that 🙇

done with this commit: 0ffee29

[gioboa]

I did some research with AI and there is a way to preserve all the files with the same formatting. You can achieve it with the right configuration. This means: new faster tool and same formatting, it will be amazing

[Kenzo-Wada]

Ill get into it. Thankyou for the research!

[Kenzo-Wada]

@gioboa

I tried adjusting the oxfmt configuration, but couldn't find options to control import/function parameter line wrapping behavior.

Also, I noticed the existing codebase has inconsistent formatting (mixed single/double quotes in some files), which may complicate the migration.
Could you share the configuration from your research? I'd be happy to test it!

[wmertens]

@Kenzo-Wada about the inconsistencies: the starters subdirectory isn't configured quite correctly. It would be great if it is consistent with the rest.