new folder structure

file_io/src/helpers.cpp

@@ -0,0 +1,11 @@
+#include "aare/helpers.hpp"
+
+
+bool is_master_file(std::filesystem::path fpath) {
+    std::string stem = fpath.stem();
+    if (stem.find("_master_") != std::string::npos)
+        return true;
+    else
+        return false;
+}
+