chore: migrate to eslint 9

eslint.config.mjs

@@ -0,0 +1,42 @@
+import drizzle from "eslint-plugin-drizzle";
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import tsParser from "@typescript-eslint/parser";
+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 [...compat.extends(
+    "next/core-web-vitals",
+    "prettier",
+    "plugin:drizzle/all",
+    "plugin:@typescript-eslint/recommended",
+), {
+    plugins: {
+        drizzle,
+        "@typescript-eslint": typescriptEslint,
+    },
+
+    languageOptions: {
+        parser: tsParser,
+        ecmaVersion: 2022,
+        sourceType: "module",
+
+        parserOptions: {
+            project: "./tsconfig.json",
+        },
+    },
+
+    rules: {
+        "@typescript-eslint/consistent-type-imports": "error",
+        "@typescript-eslint/no-import-type-side-effects": "error",
+    },
+}];

package.json

@@ -51,6 +51,7 @@
     "zod": "^3.24.1"
   },
   "devDependencies": {
+    "@eslint/eslintrc": "^3.2.0",
     "@eslint/js": "^9.17.0",
     "@fluid-tailwind/tailwind-merge": "^0.0.3",
     "@next/bundle-analyzer": "15.1.2",