add an example

[ValorZard]

Hello!
I'm very interested in using this engine, but I can't seem to figure out how exactly to use it. I've looked at the documentation, but all I see are just snippets of code. I'd really appreciate it if there could be one example project or code that does a minimal version of how to setup a webtransport client and server

[marten-seemann]

Please refer to https://quic-go.net/docs/webtransport/. We have sample code for both client and server side there.

[marten-seemann]

We could add some example code to this repo though, similar to what we have in quic-go.

[anderspitman]

Anyone finding this later might be interested in the PR I opened which shows a simple echo setup: #122

I don't think it compiles as-is anymore, but should be you close.