Add rx_streamdummyheader command (#1442)

* add rx_restream_stop command. This allows to send a ZMQ dummy header any time user wants to do so. For example this allows to pre-configure the ZMQ processing software before the acquisition begins. Therefore, the dummy header was adapted in order to contain the fields stored in the receiver.

* renamed command, changed inherit, moved commands to zmq related section

* update filename in restreamstop

* renamed helper function, sorted header fields alphabetically

* fixed fnametostream set

* renamed functions, add SetFileName method, format JSON parameters order

* added python bindings and formatting (does nothing really)

* renamed restream stop functions to stream dummy

* checkout .github files from ed8c885

* release notes

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Co-authored-by: Dhanya Thattil <dhanya.thattil@psi.ch>

python/src/detector.cpp

@@ -1083,6 +1083,10 @@ void init_det(py::module &m) {
     CppDetectorApi.def("setRxZmqHwm",
                        (void (Detector::*)(const int)) & Detector::setRxZmqHwm,
                        py::arg());
+    CppDetectorApi.def("streamRxDummyHeader",
+                       (void (Detector::*)(sls::Positions) const) &
+                           Detector::streamRxDummyHeader,
+                       py::arg() = Positions{});
     CppDetectorApi.def("getSubExptime",
                        (Result<sls::ns>(Detector::*)(sls::Positions) const) &
                            Detector::getSubExptime,