chore: update eslint

eslint.config.mjs

@@ -0,0 +1,51 @@
+import globals from "globals";
+import babelParser from "@babel/eslint-parser";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+import vitest from "@vitest/eslint-plugin";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all,
+});
+
+export default [
+  {
+    ignores: [
+      "tests/**/*",
+      "src/init/artifacts/test/**/*",
+      "src/init/update-artifacts/test/**/*",
+      "build/**/*",
+    ],
+  },
+  ...compat.extends("plugin:prettier/recommended", "eslint:recommended"),
+  {
+    plugins: { vitest },
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...vitest.environments.env.globals,
+      },
+      parser: babelParser,
+      ecmaVersion: 2020,
+      sourceType: "module",
+      parserOptions: {
+        requireConfigFile: false,
+        project: "./tsconfig.json",
+        ecmaFeatures: {
+          modules: true,
+        },
+      },
+    },
+    rules: {
+      ...vitest.configs.recommended.rules,
+      "@typescript-eslint/no-use-before-define": "off",
+      "no-use-before-define": "off",
+    },
+  },
+];