[Feature]: ESLint flat config support for @redwoodjs/eslint-plugin

[JoshuaKGoldberg]

What's not working?

Coming over from eslint/eslint#18093 -> #10897 (comment): ESLint is migrating to a new "flat config" format that will be the default in ESLint v9.

It doesn't look like @redwoodjs/eslint-config has support yet. I'm posting this issue here as a reference & cross-linking it to the table in eslint/eslint#18093. If there's anything technical blocking the extension from supporting flat configs, please let us know - we'd be happy to try to help! 💜

Additional resources:

• Configuration Migration Guide
• Plugin Migration Guide
• Blog posts on the new config system: Part 1: Background, Part 2: Introduction to flat config

Per #10897 (comment), this issue is specifically for 🍌 @redwoodjs/eslint-plugin, not 🍎 @redwoodjs/eslint-config.

How do we reproduce the bug?

Make an eslint.config.js with:

import redwood from '@redwoodjs/eslint-plugin'

export default [/ * ... */ ]

...but the package doesn't yet export any configs we can use here in the flat config format.

What's your environment? (If it applies)

System:
    OS: macOS 13.2
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 20.11.0 - /var/folders/sr/j__6_9gn0dv557z0xf3p7y8h0000gn/T/yarn--1719857847260-0.8362240404148904/node
    Yarn: 1.22.19 - /var/folders/sr/j__6_9gn0dv557z0xf3p7y8h0000gn/T/yarn--1719857847260-0.8362240404148904/yarn

Are you interested in working on this?

• I'm interested in working on this

[Tobbe]

Thanks for your issues and the PR. I'll try to dig and and follow up with any questions I might have