Initial commit: QobuzD - Qobuz Connect renderer for Linux

Rust-based QConnect renderer with:
- QConnect WebSocket protocol (hand-rolled protobuf)
- Audio playback via Symphonia + cpal
- Play, pause, resume, volume, skip support
- Correct BufferState/PlayingState enum values per proto spec
- Server-driven queue management (no local queue)
- Periodic position reporting for track-end detection

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib.rs

@@ -0,0 +1,9 @@
+pub mod api;
+pub mod auth;
+pub mod config;
+pub mod crypto;
+pub mod error;
+pub mod player;
+pub mod qconnect;
+pub mod token;
+pub mod types;