face: introduce HTTP/3 WebTransport listener

[yoursunny]

No description provided.

[zjkmxy]

LGTM.
Haven't tested, though.

[Copilot]

Pull Request Overview

This PR adds support for an HTTP/3 WebTransport listener to the application.

• Introduces HTTP/3 configuration in the YAML and core config files.
• Implements new HTTP3Transport and HTTP3Listener types to handle WebTransport sessions.
• Updates URI handling to support the new "quic" scheme and integrates the listener in the command startup.

Reviewed Changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
fw/yanfd.sample.yml	Adds HTTP3 configuration section.
fw/face/http3-transport.go	Implements transport logic for HTTP/3 WebTransport connections.
fw/face/http3-listener.go	Introduces the listener for HTTP/3 WebTransport sessions.
fw/defn/uri.go	Adds support for generating QUIC/HTTP3 URIs and updates URI decoding.
fw/defn/uri_test.go	Extends tests to cover the new QUIC URI format.
fw/core/config.go	Extends configuration to include HTTP3 settings.
fw/cmd/yanfd.go	Integrates HTTP3 listener instantiation into the server startup flow.

Files not reviewed (1)

• go.mod: Language not supported

Comments suppressed due to low confidence (2)

fw/face/http3-listener.go:98

• [nitpick] Consider logging or otherwise handling the error from l.server.Upgrade to aid troubleshooting when the upgrade fails.

if e != nil { return }

fw/defn/uri_test.go:88

• [nitpick] Expand test coverage for QUIC URIs to verify that canonical properties and proper URI string formatting are maintained, as done for other protocols.

uri = defn.DecodeURIString("quic://[::1]:443")