Restructure "src/" folder

Moving files from the "src/" folder into "src/legacy", "src/macro-core",
and "src/utils" was necessary as it was becoming a bit too cluttered.

src/macro-core/macro-action.cpp

@@ -0,0 +1,32 @@
+#include "macro-action.hpp"
+#include "advanced-scene-switcher.hpp"
+
+bool MacroAction::Save(obs_data_t *obj)
+{
+	MacroSegment::Save(obj);
+	obs_data_set_string(obj, "id", GetId().c_str());
+	return true;
+}
+
+bool MacroAction::Load(obs_data_t *obj)
+{
+	MacroSegment::Load(obj);
+	return true;
+}
+
+void MacroAction::LogAction()
+{
+	vblog(LOG_INFO, "performed action %s", GetId().c_str());
+}
+
+void MacroRefAction::ResolveMacroRef()
+{
+	_macro.UpdateRef();
+}
+
+void MultiMacroRefAction::ResolveMacroRef()
+{
+	for (auto &m : _macros) {
+		m.UpdateRef();
+	}
+}