refactor: split configs and plugin to separate modules

[9romise]

Move configs and plugins to separate modules, avoid circular dependencies. This can help resolve test errors in #2916.

[changeset-bot]

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Latest commit: 0d49b24

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[FloEdelmann]

Makes sense to me, thank you! 🙂

[Copilot]

Pull request overview

This PR refactors the plugin architecture by splitting configs and plugin into separate modules to avoid circular dependencies and resolve test errors.

Key Changes:

• Created lib/plugin.js containing rules and processors (auto-generated)
• Created lib/configs/index.js to centralize all config exports
• Updated lib/index.js to combine plugin and configs modules
• Updated flat config files to reference ../../plugin instead of ../../index
• Replaced tools/update-lib-index.js with tools/update-lib-plugin.js

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tools/update.js	Updated to require the new update-lib-plugin script instead of update-lib-index
tools/update-lib-plugin.js	New script that generates lib/plugin.js with rules and processors
tools/update-lib-index.js	Removed - replaced by separate plugin and configs modules
tools/update-lib-flat-configs.js	Updated to reference ../../plugin instead of ../../index in generated flat configs
lib/plugin.js	New auto-generated file containing plugin meta, rules, and processors
lib/index.js	Refactored to import and combine separate configs and plugin modules
lib/configs/index.js	New file that centralizes all config exports (eslintrc, flat, and no-layout-rules)
lib/configs/flat/base.js	Updated to require ../../plugin instead of ../../index to avoid circular dependencies

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