✅ Retake as ESLint Flat Config

[StewEucen]

Overview

• Retake as ESLint Flat Config

• See #512

Format

• eslint.config.js

  
  import customConfig from 'eslint-config-custom'

export default [ customComfig, { files: [ '/*.js', '*/.cjs', ], rules: { 'no-unused-vars': 'error', semi: 'error', // <---------- 👀 override }, }, { files: [ '/*.js', ], rules: { 'no-undef': 'error', semi: 'warm', // <---------- 👀 override }, }, ]

## Reference

* [ESLintのconfigがどのように変わり得るか（flat configとは何か）](https://zenn.dev/makotot/articles/0d9184f3dde858)

## Tasks

- [ ] Replace empty rule as ESLint flat config
- [ ] Fulfill existing rules to ESLint flat config

[StewEucen]

• 536