🚨(i18n) upgrade eslint to v9 with i18n package

We upgraded ESLint to version 9 in the i18n package,
which includes several improvements and fixes.
This change also involves updating the ESLint
configuration files to the new format and ensuring
compatibility with the latest ESLint features.

src/frontend/packages/i18n/.eslintrc.js

@@ -1,11 +0,0 @@
-module.exports = {
-  root: true,
-  extends: ['impress/jest', 'plugin:import/recommended'],
-  parserOptions: {
-    sourceType: 'module',
-    ecmaVersion: 'latest',
-    tsconfigRootDir: __dirname,
-    project: ['./tsconfig.json'],
-  },
-  ignorePatterns: ['node_modules'],
-};

src/frontend/packages/i18n/eslint.config.mjs

@@ -0,0 +1,20 @@
+import { defineConfig } from '@eslint/config-helpers';
+import docsPlugin from 'eslint-plugin-docs';
+
+const eslintConfig = defineConfig([
+  {
+    files: ['**/*.ts', '**/*.mjs', '**/*.js'],
+    plugins: {
+      docs: docsPlugin,
+    },
+    extends: ['docs/next', 'docs/test'],
+    languageOptions: {
+      parserOptions: {
+        tsconfigRootDir: import.meta.dirname,
+        project: ['./tsconfig.json'],
+      },
+    },
+  },
+]);
+
+export default eslintConfig;

src/frontend/packages/i18n/package.json

@@ -8,7 +8,7 @@
     "format-deploy": "yarn format-deploy:impress",
     "format-deploy:impress": "node ./format-deploy.mjs --app=impress --output=../../apps/impress/src/i18n/translations.json",
     "format-rebuild-fr:impress": "node ./rebuild-translations.mjs --language=fr --app=impress --output=../../apps/impress/src/i18n/translations.json",
-    "lint": "eslint --ext .js,.ts,.mjs .",
+    "lint": "eslint",
     "test": "jest"
   },
   "dependencies": {

src/frontend/packages/i18n/tsconfig.json

@@ -16,6 +16,8 @@
   },
   "include": [
     "**/*.ts",
+    "**/*.js",
+    "**/*.mjs"
   ],
   "exclude": ["node_modules"]
 }