Ability to serve `.html.gz`, `.js.gz` `.json.gz` etc.

[hybridherbst]

Description

In #460, compressing files on serve was introduced.

However, it looks like serve still can't serve already compressed files. (e.g. result of viteCompression() or other commonly used plugins)

Would it be possible to add that?

Why

Testing full deployments of already prezipped files that the server just unpacks on serve

Alternatives

Locally testing without gzip and not really being sure if the gzipped version also works