Normalize paths for windows dev server

[pi0]

Linked issues:

• https://github.com/nuxt/nuxt.js/issues/15249
• https://github.com/nuxt-modules/turnstile/issues/85
  • https://github.com/Baroshem/nuxt-security/issues/42
• https://github.com/nuxt-modules/html-validator/issues/232

They were fixed by https://github.com/unjs/nitro/pull/732 and https://github.com/unjs/nitro/pull/733 but since fixes introduced new issues (https://github.com/unjs/nitro/issues/808), reverting on 2.x edge until finding a new solution.

[pi0]

From linked issues, a common problem was, externals.inline is not being effective. inlined runtime dir by nuxt-turnstile using node's fileURLToPath has backslash and not matching fixed by https://github.com/unjs/nitro/commit/0638f6446e94f02032f51740cc5201ca4d98fcdf and nuxt-security not including it at all (https://github.com/Baroshem/nuxt-security/pull/84)

In addition, Nuxt has to automatically add transpile[] to externals.inline[] i belive for best DX. (we need downstream issue @danielroe )

Also while most of the cases with plugins and middleware need to be inlined, it seems there is still an strange behavior by rollup that even when returning {id: 'file://...', external: true} from resolver it trims it out from final bundle. I will try to investigate this more but probably better if we have a pure nitro reproduction first for this. It might be also a case with unimport.