Implements a QUIC interface, loosely based on the WebTransport API (a
future change could add the WebTransport API, built on top of this one).
[quinn](https://docs.rs/quinn/latest/quinn/) is used for the underlying
QUIC implementation, for a few reasons:
- A cloneable "handle" api which fits quite nicely into deno resources.
- Good collaboration with the rust ecosystem, especially rustls.
- I like it.
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