Added board firmware update functionality

firmwareupdatehelper.cpp

@@ -0,0 +1,29 @@
+#include "firmwareupdatehelper.h"
+
+#include "bmsinterface.h"
+
+#include <QFile>
+#include <QByteArray>
+
+
+FirmwareUpdateHelper::FirmwareUpdateHelper(QObject *parent) : QObject(parent)
+{
+}
+
+bool FirmwareUpdateHelper::uploadFirmware(QString filename, BMSInterface *interface)
+{
+    QFile file(filename);
+
+    if (!file.open(QIODevice::ReadOnly))
+    {
+        interface->emitMessageDialog(tr("Upload error"),
+                                     tr("Could not open file. Make sure that the path is valid."),
+                                     false);
+        return false;
+    }
+
+    auto data = file.readAll();
+    interface->commands()->startFirmwareUpload(data, false);
+
+    return true;
+}