feat(qconnect-app): add app adapter with pending timeout, resync and concurrency policy

-cx

crates/qconnect-app/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "qconnect-app"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+description = "UI-agnostic Qobuz Connect application adapter"
+
+[dependencies]
+qconnect-core = { path = "../qconnect-core" }
+qconnect-protocol = { path = "../qconnect-protocol" }
+qconnect-transport-ws = { path = "../qconnect-transport-ws" }
+async-trait = { workspace = true }
+tokio = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+thiserror = { workspace = true }
+uuid = { version = "1", features = ["v4"] }
+
+[dev-dependencies]
+tokio = { workspace = true, features = ["test-util"] }