Rx roi zmq (#726)

adding rx_roi also in the zmq header for external guis to put the "yellow box".. sending full roi instead of -1, and sending for each zmq port. "(multiple yellow boxes)".

slsSupportLib/include/sls/ZmqSocket.h

@@ -13,6 +13,7 @@
 #include "sls/sls_detector_exceptions.h"
 
 #include <map>
+#include <array>
 #include <memory>
 
 // Selective suppression of  warning in gcc,
@@ -83,6 +84,8 @@ struct zmqHeader {
     bool completeImage{false};
     /** additional json header */
     std::map<std::string, std::string> addJsonHeader;
+    /** (xmin, xmax, ymin, ymax) roi only in files written */
+    std::array<int,4> rx_roi{};
 };
 
 class ZmqSocket {