fix(openapi): use direct import instead of nitro alias (#192)

Author: farnabaz

src/features.ts

@@ -97,7 +97,7 @@ export function setupKV(_nuxt: Nuxt) {
 export function setupOpenAPI(nuxt: Nuxt) {
   // Fallback to custom placeholder when openAPI is disabled
   nuxt.options.alias['#hub/openapi'] = nuxt.options.nitro?.experimental?.openAPI === true
-    ? '#internal/nitro/routes/openapi'
+    ? 'nitropack/runtime/routes/openapi'
     : resolve('./runtime/openapi/server/templates/openapi')
 
   addServerScanDir(resolve('./runtime/openapi/server'))