fix: storage does not show internal `cache` storage of Nitro

[TheAlexLichter]

🐛 The bug

When opening the devtools, no cache storage is shown even though it is there by default due to Nitro. It would be helpful to see the storage so one can manage cache entries from the devtools

Steps to reproduce:

1. Open any Nuxt app
2. Open the Devtools
3. Select the Storage Tab
4. See that cache is not there.

🛠️ To reproduce

https://stackblitz.com/github/nuxt/starter/tree/v3

🌈 Expected behavior

The nuxt devtools should show the cache storage.

ℹ️ Additional context