upgrade eslint v9

Author: odanado

eslint.config.mjs

@@ -0,0 +1,19 @@
+// @ts-check
+
+import eslint from "@eslint/js";
+import tseslint from "typescript-eslint";
+import eslintConfigPrettier from "eslint-config-prettier";
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  tseslint.configs.recommendedTypeChecked,
+  {
+    languageOptions: {
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+  eslintConfigPrettier,
+);