migrate eslint config

.eslintrc.json

@@ -1,3 +0,0 @@
-{
-  "extends": ["next/core-web-vitals", "prettier"]
-}

eslint.config.mjs

@@ -0,0 +1,17 @@
+import { defineConfig } from "eslint/config";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+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 defineConfig([{
+    extends: compat.extends("next/core-web-vitals", "prettier"),
+}]);