fix: add eslint/prettier to root and update eslint config

apps/web/package.json

@@ -82,4 +82,4 @@
     "tsx": "^4.21.0",
     "typescript": "5.9.3"
   }
-}
+}

eslint.config.js

@@ -0,0 +1,23 @@
+import mintelConfig from "@mintel/eslint-config";
+import { nextConfig } from "@mintel/eslint-config/next";
+
+export default [
+    ...mintelConfig,
+    {
+        files: ["apps/web/**/*.{js,jsx,ts,tsx}"],
+        ...nextConfig[0], // Ignores and common stuff
+    },
+    ...nextConfig.slice(1).map(config => ({
+        ...config,
+        files: ["apps/web/**/*.{js,jsx,ts,tsx}"],
+    })),
+    {
+        ignores: [
+            "**/node_modules/**",
+            "**/.next/**",
+            "**/out/**",
+            "**/dist/**",
+            "**/build/**",
+        ],
+    },
+];