feat: migrate to FlatConfig

[yoshinorin]

Refs: #55

check list

• Add test cases for the changes.
• Passed the CI test.

Usage

// Before FlatConfig
{
  "root": true,
  "extends": "hexo/ts.js",
  "parserOptions": {
    "sourceType": "module",
    "ecmaVersion": 2020
  },
  "rules": {
    "@typescript-eslint/no-explicit-any": 0,
    "@typescript-eslint/ban-ts-comment": 0,
    "@typescript-eslint/no-this-alias": 0
  }
}

// After
// In `eslint.config.js`
const hexoTsLint = require('eslint-config-hexo/ts');

module.exports = [
  ...hexoTsLint,
  {
    languageOptions: {
      ecmaVersion: 2022,
    },
    rules: {
      "@typescript-eslint/no-explicit-any": 0,
      "@typescript-eslint/ban-ts-comment": 0,
      "@typescript-eslint/no-this-alias": 0
    }
  }
];

[SukkaW]

Since we are creating new presets, it is a good chance for us to add a few more presets. E.g. we could add https://www.npmjs.com/package/eslint-plugin-mocha since almost all Hexo repos use mocha.

Note that we might need to disable a few rules (E.g. mocha/no-mocha-arrows since we all use arrow functions).

[uiolee]

need "type": "module", or name js file to mjs

Oops! Something went wrong! :(

ESLint: 9.11.1

/home/user/eslint-config-hexo/eslint.js:1
import nodePlugin from 'eslint-plugin-n';
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at internalCompileFunction (node:internal/vm:77:18)
    at wrapSafe (node:internal/modules/cjs/loader:1288:20)

[SukkaW]

Then keep using const = require then. In the ESLint world, CommonJS is still the first-class citizen.

[yoshinorin]

@hexojs/core
Sorry for the delay in implementing the changes (I'm currently very busy with personal matters...) and perhaps ready for review.

Thanks :)

[stevenjoezhang]

Tested in hexojs/hexo-renderer-marked#306

[stevenjoezhang]

Some tests failed here: hexojs/hexo#5599
Need fix

[yoshinorin]

Some tests failed here: hexojs/hexo#5599
Need fix

Coverage collection has failed, but all other tests have passed. The eslint changes are unrelated to the test results.

[uiolee]

this will overwrite the rules in mochaPlugin.configs.flat.recommended, please make sure this meets your expectations

[uiolee]

Such naming may be confusing