refactor: @eslint/config-helpers ベースで設定をいじるようにする

[sushichan044]

外部に公開される型定義に typescript-eslint の型が入ってくるのをやめたい

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Latest commit: 9226bff

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commit: 9226bff

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[Copilot]

Pull Request Overview

This PR refactors the ESLint configuration to use @eslint/config-helpers instead of typescript-eslint for configuration management, aimed at removing typescript-eslint types from externally exposed type definitions.

• Replaces tseslint.config() with defineConfig() from @eslint/config-helpers across all configuration files
• Introduces a backward compatibility helper (prepareForExtend) to handle differences in file inheritance behavior
• Updates type annotations from typescript-eslint specific types to standard ESLint types

Reviewed Changes

Copilot reviewed 16 out of 17 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
packages/eslint-config/src/utils/eslint.ts	New utility file with backward compatibility helper for config extension
packages/eslint-config/src/presets/*.ts	Updated all preset files to use defineConfig instead of tseslint.config
packages/eslint-config/src/base/*.ts	Refactored base configuration files to use @eslint/config-helpers and standard ESLint types
packages/eslint-config/src/addons/*.ts	Updated addon configurations to use defineConfig
packages/eslint-config/package.json	Added dependencies for @eslint/config-helpers and defu

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported