docs(nuxt): correct api directory (#12358)

* docs(nuxt): correct api directory

I think this should be `server/api/*`, I've never seen event handlers directly under `server`, but feel free to correct me if I'm wrong.

* docs(nuxt): improve error testing script

Author: dargmuesli

platform-includes/getting-started-verify/javascript.nuxt.mdx

@@ -5,13 +5,10 @@ Check out the <PlatformLink to="/install/cli-import">`--import` CLI flag</Platfo
 
 To verify that Sentry works on the server-side, add the following snippet on the server-side:
 
-```js {tabTitle:Nitro} {filename:server/sentry-example-api.ts}
-import { defineEventHandler } from '#imports';
-
+```js {tabTitle:Nitro} {filename:server/api/sentry-example.get.ts}
 export default defineEventHandler(event => {
   throw new Error("Sentry Example API Route Error");
 });
-
 ```
 
 If you want to test server-side monitoring locally, build your project and run:
@@ -34,7 +31,6 @@ Add the following snippet on the client-side:
 ```html {tabTitle:Vue} {filename:pages/example-error.vue}
 <script setup>
   import * as Sentry from '@sentry/nuxt';
-  import { useFetch} from '#imports'
 
   function triggerClientError() {
     throw new Error("Nuxt Button Error");
@@ -47,7 +43,7 @@ Add the following snippet on the client-side:
         op: 'test'
       },
       async () => {
-        await useFetch('/sentry-example-api');
+        await $fetch('/api/sentry-example');
       }
     )
   }
@@ -62,5 +58,3 @@ Add the following snippet on the client-side:
   </button>
 </template>
 ```
-
-