add back deno nodejs compatibility for backwards compatibility

[huseeiin]

add back deno nodejs compatibility for deno v1 backwards compatibility
previously nitro v2 added process, Buffer, global, etc. to globalThis when using deno-server but nitro v3 doesn't
it doesn't hurt if you bring this back

[pi0]

Can you explain why you need to use Deno v1?

With deno v2's full node compat we can avoid many workarounds were causing inconsistency and issues + adding (unenv) polyfills might be straightforward.

[MickL]

I would also suggest to stick with dropped backwards compatibility if it is for the better (avoid workarounds and inconsistencies). Deno v2 came out 2024 already.