An example about how to embed static web resources in hertz

[kamiertop]

Is your feature request related to a problem? Please describe.

An example about how to embed static web resources in hertz.

Describe the solution you'd like

I'm going to add an example.

Describe alternatives you've considered

None.

Additional context

Add any other context or screenshots about the feature request here.
None.

[xiaost]

https://github.com/cloudwego/hertz-examples/tree/main/file

embed static web resources are kind of in-memory files.
if user wants to know how to serve files, see the link above.