docs(nuxt): Use H3 utilities (#257)

Just a small PR replacing direct response manipulation with H3's utils 🫡

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Refactor**
- Standardized error handling for unmatched routes by implementing a
unified approach for setting response statuses.
- Improved header management by adopting a consistent method for
retrieving authorization details.
- Adjusted the flow for HTML responses to return content directly
instead of explicitly ending responses.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: wobsoriano

apps/content/docs/integrations/nuxt.md

@@ -30,8 +30,8 @@ export default defineEventHandler(async (event) => {
     return
   }
 
-  event.node.res.statusCode = 404
-  event.node.res.end('Not found')
+  setResponseStatus(event, 404, 'Not Found')
+  return 'Not found'
 })
 ```
 

playgrounds/nuxt/server/routes/api/[...].ts

@@ -15,7 +15,8 @@ const openAPIHandler = new OpenAPIHandler(router, {
 })
 
 export default defineEventHandler(async (event) => {
-  const context = event.node.req.headers.authorization
+  const authorization = getHeader(event, 'authorization')
+  const context = authorization
     ? { user: { id: 'test', name: 'John Doe', email: 'john@doe.com' } }
     : {}
 
@@ -28,6 +29,6 @@ export default defineEventHandler(async (event) => {
     return
   }
 
-  event.node.res.statusCode = 404
-  event.node.res.end('Not found')
+  setResponseStatus(event, 404, 'Not Found')
+  return 'Not Found'
 })

playgrounds/nuxt/server/routes/rpc/[...].ts

@@ -11,7 +11,8 @@ const rpcHandler = new RPCHandler(router, {
 })
 
 export default defineEventHandler(async (event) => {
-  const context = event.node.req.headers.authorization
+  const authorization = getHeader(event, 'authorization')
+  const context = authorization
     ? { user: { id: 'test', name: 'John Doe', email: 'john@doe.com' } }
     : {}
 
@@ -24,6 +25,6 @@ export default defineEventHandler(async (event) => {
     return
   }
 
-  event.node.res.statusCode = 404
-  event.node.res.end('Not found')
+  setResponseStatus(event, 404, 'Not Found')
+  return 'Not Found'
 })

playgrounds/nuxt/server/routes/scalar.ts

@@ -32,6 +32,6 @@ export default defineEventHandler(async (event) => {
       </html>
     `
 
-  event.node.res.setHeader('Content-Type', 'text/html')
-  event.node.res.end(html)
+  setResponseHeader(event, 'content-type', 'text/html')
+  return html
 })