Add argparse.hpp for argument parsing structure

Author: TimGoTheCreator

argparse/argparse.hpp

@@ -0,0 +1,15 @@
+#pragma once
+#include <string>
+
+namespace next {
+
+struct Arguments {
+    std::string input_file;
+    double dt;
+    double dump_interval;
+    bool use_vtu;
+};
+
+Arguments parse_arguments(int argc, char** argv);
+
+}