[WIP] chore(config): migrate to new eslint config

[skjnldsv]

I'm kinda stuck. Anyone feel free to help

Currently struggling with the plugins and the extends.
Seems we could help ourselves from https://eslint.org/blog/2022/08/new-config-system-part-2/#backwards-compatibility-utility

• Migrate config
• Split each config into separate files for readability and import-spread them in the main eslint.config.js file?

Refs:

• https://eslint.org/docs/latest/user-guide/configuring/configuration-files-new
• https://eslint.org/blog/2022/08/new-config-system-part-1/
• https://eslint.org/blog/2022/08/new-config-system-part-2/

[susnux]

@skjnldsv I pushed some commits fixing the config, it is now possible to use it for linting.
I added comments why each config had to be included using the compat wrapper, I did not test TS just the first sub-config.

I think the problem was that eslint must be setup to support esm, but it was set to ES6 (min. 2017 is required, for some options even ES2020).

[skjnldsv]

lint is failing :)

[skjnldsv]

This would be a breaking change @susnux @raimund-schluessler ?

[susnux]

Hm, it feels like yes, but as we already require an eslint version that supports flat configs this should not break any packages that works with the current release.

[susnux]

New ESLint with flat config was released 🎉
Time for a new major version here :)

Just waiting for this blocker: typescript-eslint/typescript-eslint#8211