eslint-config/eslint-plugin: Support "Flat Config" (ESLint 9)

[JoshuaKGoldberg]

Description

👋 Coming over from eslint/eslint#18093: ESLint is migrating to a new "flat config" format that will be the default in ESLint v9.

It doesn't look like @react-native-community/eslint-plugin 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
• (edit) Plugin Migration Guide
• Blog posts on the new config system: Part 1: Background, Part 2: Introduction to flat config

(sorry for not using the issue template properly - I wasn't sure how best to report this)

Steps to reproduce

1. Have an eslint.config.js (flat config)
2. See setup instructions https://www.npmjs.com/package/@react-native-community/eslint-plugin
3. Note the missing mention of flat config

React Native Version

n/a

Affected Platforms

Other (please specify)

Output of npx react-native info

n/a

Stacktrace or Logs

n/a

Reproducer

n/a

Screenshots and Videos

No response

[github-actions]

⚠️	Add or Reformat Version Info
ℹ️	We could not find or parse the version number of React Native in your issue report. Please use the template, and report your version including major, minor, and patch numbers - e.g. 0.70.2

[github-actions]

⚠️	Missing Reproducible Example
ℹ️	We could not detect a reproducible example in your issue report. Please provide either: If your bug is UI related: a Snack If your bug is build/update related: use our Reproducer Template. A reproducer needs to be in a GitHub repository under your username.

[cortinico]

It doesn't look like `@react-native-community/eslint-plugin has support yet

Hey @JoshuaKGoldberg, we don't maintain this package anymore. Did you mean @react-native/eslint-plugin?

[JoshuaKGoldberg]

Oh! Maybe I did. Sorry, I haven't written anything in React Native in a few years and I got confused by all the similar names 😅.

Just confirming where the packages are now, what package(s) should I be filing this issue on?

I think part of my confusion comes from both https://www.npmjs.com/package/@react-native/eslint-plugin and https://www.npmjs.com/package/@react-native-community/eslint-plugin linking to this repo.