Added logic surplus calculation intrabuilding wise

tests/services/test_Surplus.cpp

@@ -0,0 +1,9 @@
+//
+// Created by StanislausCichocki on 10.03.2025.
+//
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest/doctest.h"
+
+TEST_CASE("Testing add function") {
+ CHECK(true);
+}