Start the level manager for tomorrow.

tests/levelmanager.cpp

@@ -0,0 +1,18 @@
+#include <catch2/catch_test_macros.hpp>
+#include <fmt/core.h>
+#include "gui.hpp"
+#include "map.hpp"
+#include "dinkyecs.hpp"
+#include "worldbuilder.hpp"
+#include "save.hpp"
+#include "systems.hpp"
+#include "spatialmap.hpp"
+#include "levelmanager.hpp"
+
+using namespace fmt;
+using namespace components;
+using std::string;
+
+TEST_CASE("", "[levelmanager]") {
+  // empty test to get setup
+}