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>

Cargo.toml

@@ -0,0 +1,44 @@
+[package]
+name = "qobuzd"
+version = "0.1.0"
+edition = "2021"
+authors = ["QobuzD Team"]
+description = "Qobuz Connect client for Linux"
+license = "MIT"
+
+[dependencies]
+reqwest = { version = "0.12", features = ["json", "rustls-tls-webpki-roots", "stream", "blocking"], default-features = false }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+tokio = { version = "1", features = ["full"] }
+md-5 = "0.10"
+hmac = "0.12"
+sha2 = "0.10"
+rand = "0.8"
+base64 = "0.22"
+uuid = { version = "1.0", features = ["v4"] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+tracing-appender = "0.2"
+directories = "5.0"
+thiserror = "1.0"
+chrono = { version = "0.4", features = ["serde"] }
+anyhow = "1.0"
+clap = { version = "4.0", features = ["derive"] }
+keyring = "3"
+zeroize = { version = "1.5", features = ["derive"] }
+aes-gcm = "0.10"
+rand_chacha = "0.3"
+sha1 = "0.10"
+hex = "0.4"
+tokio-tungstenite = { version = "0.24", features = ["native-tls", "native-tls-vendored"] }
+futures-util = "0.3"
+symphonia = { version = "0.5", features = ["flac", "pcm", "mp3", "aac", "ogg", "wav"] }
+cpal = "0.15"
+rubato = "0.15"
+
+[profile.release]
+strip = true
+lto = true
+codegen-units = 1
+opt-level = "z"