add new payload module

mission/system/payload/payloadModeTree.h

@@ -0,0 +1,17 @@
+#ifndef MISSION_SYSTEM_TREE_PAYLOADMODETREE_H_
+#define MISSION_SYSTEM_TREE_PAYLOADMODETREE_H_
+
+#include <mission/system/objects/PayloadSubsystem.h>
+
+namespace satsystem {
+
+namespace payload {
+
+extern PayloadSubsystem SUBSYSTEM;
+
+Subsystem& init();
+}  // namespace payload
+
+}  // namespace satsystem
+
+#endif /* MISSION_SYSTEM_TREE_PAYLOADMODETREE_H_ */