feat: upgrade ESLint to v10 with flat config migration

[Copilot]

ESLint v8 → v10 requires migrating from the legacy .eslintrc format to the new flat config system. @mia-platform/eslint-config-mia@9 was evaluated but dropped — it depends on eslint-plugin-import@2.x which calls sourceCode.getTokenOrCommentAfter(), an internal API removed in ESLint v10.

Changes

Dependencies (package.json)

• eslint: ^8.53.0 → ^10.2.1
• Removed @mia-platform/eslint-config-mia (ESLint v10 incompatible)
• Added @eslint/js@^10.0.1 and globals@^17.5.0 as replacements
• Removed eslintConfig field (legacy format, unsupported in ESLint v9+)
• Lint script: dropped --ignore-path .gitignore (replaced by ignores in flat config)

New eslint.config.js — flat config using @eslint/js recommended rules with Node.js CommonJS globals, ecmaVersion: 2022, and explicit ignore patterns:

const js = require('@eslint/js')
const globals = require('globals')

module.exports = [
  { ignores: ['node_modules/**', 'coverage/**', '.nyc_output/**', '.tap/**', 'example/**'] },
  js.configs.recommended,
  {
    languageOptions: {
      ecmaVersion: 2022,
      sourceType: 'commonjs',
      globals: { ...globals.node, ...globals.es2022 },
    },
  },
]

Stale eslint-disable comments removed across 5 files for rules removed/renamed in ESLint v9+:

• valid-jsdoc — rule removed
• global-require — rule removed
• id-blacklist — renamed to id-denylist
• Unused no-console and no-shadow inline directives

Checklist

• your branch will not cause merge conflict with master
• run npm test
• tests are included
• the documentation is updated or integrated accordingly with your changes
• the code will follow the lint rules and style of the project
• you are not committing extraneous files or sensible data