feat(poly): initial build system for polytrope

src/poly/utils/public/polyIO.h

@@ -0,0 +1,16 @@
+#ifndef POLY_IO_H
+#define POLY_IO_H
+
+#include "mfem.hpp"
+#include <string>
+
+/**
+ * @brief Writes the solution to a CSV file.
+ * 
+ * @param u The GridFunction containing the solution.
+ * @param mesh The mesh associated with the solution.
+ * @param filename The name of the CSV file to write to.
+ */
+void write_solution_to_csv(const mfem::GridFunction &u, const mfem::Mesh &mesh, const std::string &filename);
+
+#endif // POLY_IO_H