Add transport into message context

[jakubkoci]

As a Developer, I want to have information about the transport layer to dispatch the outbound wire message properly. For example, if an inbound wire message was sent via WebSocket I need that information together with Socket ID and other details to send the outbound message by emitting event to the same WebSocket.

Then I could implement OutboundTransporter interface in a similar way (take the example only for demonstration purposes):

class WebSocketOutboundTransporter implements OutboundTransporter {
  ...
  async sendMessage(outboundPackage: OutboundPackage) {
    const { socketId } = outboundPackage.transport
    const socket = socketById(socketId);
    socket.emit('ariesMessage', outboundPackage.wireMessage);
  }
  ...
}

Ideally, the framework should not contain any mention about the transport layer, I mean, we should just past Transport (or TransportContext) object from MessageReceiver through the framework to MessageSender without revealing or processing information inside.