fix: vite-inspect won't use buildAssetsDir even if defined

[dotmot]

🐛 The bug

When buildAssetsDir is configured in nuxt.config.ts the vite-inspect tab will show a 404 as it tries to visit /_nuxt/__inspect/
instead of the /[buildAssetsDir]/__inspect.

This is due to the vite-inspect having this path hardcoded here.

I have open a PR that fixes this.

🛠️ To reproduce

https://stackblitz.com/edit/github-albcch?file=nuxt.config.ts

🌈 Expected behavior

The vite-inspect implementation should use buildAssetsDir when defining its src path.

ℹ️ Additional context

[pr] #588