[Feature] Add HTTP/3 (QUIC) Support

[cbeaujoin-stellar]

Summary

Add HTTP/3 support using QUIC protocol to enable faster speed tests on modern connections.

Description

Currently, librespeed-rust only supports HTTP/1 (with optional TLS). This issue proposes adding HTTP/3 (QUIC) support for:

1. Faster connection establishment - No TCP handshake, 0-RTT resumption
2. Better latency - UDP-based, no head-of-line blocking
3. Future-proofing - HTTP/3 is the next standard

Implementation

Backend

• Add noq crate for QUIC server (based on Quinn + rustls)
• Run HTTP/1 and HTTP/3 servers concurrently on different ports
• Add config options:
  • quic_port: HTTP/3 listen port (default: 8080 plain, 8443 TLS)
  • enable_quic: Enable HTTP/3 server
• Reuse existing route handlers for both servers

Frontend

• Modified servers list to dynamically generate both HTTP/1 and HTTP/3 server entries
• Modified index.html to allow protocol selection via dropdown
• Modified JS.
• Both servers share same endpoints (/empty, /garbage, /getIP, etc.)

Benefits

• Users can test both HTTP/1 and HTTP/3 performance
• Same server handles both protocols
• No special client needed

Questions

1. Is this feature of interest?
2. Should the servers run concurrently on different ports, or should we have a single server/port ?