Connection robustness improvements (#813)

* Clear heartbeat and queue when disconnected

* Give clearer error in case configure fails due to a lost connection. Used to throw 'Packet does not exist'

* If the queue processing error is due to a lost connection, throw it instead of looping endlessly

* In case we send a disconnection event we don't need to also throw

* Catch heartbeat errors

* Also handle invalid state errors

* Handle socket timeouts

* Log heartbeat failures

* Make linter happy

* Transform stream being a singleton prevented reconnection attempts

* Adapt tests to not using singleton

* Aborting already ends the connection

packages/transport-node-serial/src/transport.ts

@@ -112,9 +112,10 @@ export class TransportNodeSerial implements Types.Transport {
     });
 
     // Stream for data going FROM the application TO the Meshtastic device.
-    this._toDevice = Utils.toDeviceStream.writable;
+    const toDeviceTransform = Utils.toDeviceStream();
+    this._toDevice = toDeviceTransform.writable;
 
-    this.pipePromise = Utils.toDeviceStream.readable
+    this.pipePromise = toDeviceTransform.readable
       .pipeTo(Writable.toWeb(port) as WritableStream<Uint8Array>, {
         signal: controller.signal,
       })