Development environment setup for litep2p-webrtc

## Issue summary

We need a development environment to verify/test/try our implementation ideal with regarding WebRTC where we have smoldot extraction on one side to something that imports litep2p on the server side.

For smoldot side extraction: we need something that follows the smoldot way of using libp2p-webrtc-direct, and compiles to WASM that runs in a browser.

## Other information and links

The deliverable should be a repo that has both of libp2p-webrtc and litep2p setup

Specifically it should be able to use this test: https://github.com/paritytech/litep2p/blob/3b664f7bef7cbf86176f8929bac349f9340462d8/tests/webrtc.rs#L35

This setup should open a ping network stream and the block announce network stream; however, nothing will get sent over the block announce stream for now, but ping/pong should work.