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

-cx

crates/qconnect-app/src/lib.rs

@@ -0,0 +1,18 @@
+//! qconnect-app
+//!
+//! Application adapter that composes qconnect core + protocol + transport.
+
+mod app;
+mod error;
+mod events;
+mod feature_flags;
+mod state;
+
+pub use app::QconnectApp;
+pub use error::QconnectAppError;
+pub use events::{NoOpEventSink, QconnectAppEvent, QconnectEventSink};
+pub use feature_flags::{
+    QBZ_QCONNECT_PANEL_SWITCH, QBZ_QCONNECT_QUEUE_MODEL, QBZ_QCONNECT_STRICT_DOMAIN_ISOLATION,
+    QBZ_QCONNECT_TRANSPORT,
+};
+pub use state::QconnectRuntimeState;