introduction of eps subsystem object

mission/system/power/EpsSubsystem.cpp

@@ -0,0 +1,27 @@
+#include <mission/system/eps/EpsSubsystem.h>
+
+#include "fsfw/devicehandlers/DeviceHandlerIF.h"
+
+EpsSubsystem::EpsSubsystem(object_id_t objectId, uint32_t maxNumberOfSequences,
+                           uint32_t maxNumberOfTables)
+    : Subsystem(objectId, maxNumberOfSequences, maxNumberOfTables) {}
+
+void EpsSubsystem::announceMode(bool recursive) {
+  const char* modeStr = "UNKNOWN";
+  switch (mode) {
+    case (HasModesIF::MODE_OFF): {
+      modeStr = "OFF";
+      break;
+    }
+    case (HasModesIF::MODE_ON): {
+      modeStr = "ON";
+      break;
+    }
+    case (DeviceHandlerIF::MODE_NORMAL): {
+      modeStr = "NORMAL";
+      break;
+    }
+  }
+  sif::info << "EPS subsystem is now in " << modeStr << " mode" << std::endl;
+  return Subsystem::announceMode(recursive);
+}