feat(meshIO): added basic mesh reading implimentation

also added basic unit sphere mesh file which can be rescaled

src/meshIO/public/meshIO.h

@@ -0,0 +1,42 @@
+#ifndef MESHIO_H
+#define MESHIO_H
+
+#include "mfem.hpp"
+#include <string>
+
+/**
+ * @brief Class for handling mesh input/output operations.
+ */
+class MeshIO
+{
+private:
+    bool loaded_; ///< Flag to indicate if the mesh is loaded
+    std::string mesh_file_; ///< Filename of the mesh file
+    mfem::Mesh mesh_; ///< The mesh object
+
+public:
+    /**
+     * @brief Constructor that initializes the MeshIO object with a mesh file.
+     * @param mesh_file The name of the mesh file.
+     */
+    MeshIO(const std::string &mesh_file);
+
+    /**
+     * @brief Destructor for the MeshIO class.
+     */
+    ~MeshIO();
+
+    /**
+     * @brief Get the mesh object.
+     * @return Reference to the mesh object.
+     */
+    mfem::Mesh& GetMesh();
+
+    /**
+     * @brief Check if the mesh is loaded.
+     * @return True if the mesh is loaded, false otherwise.
+     */
+    bool IsLoaded() const;
+};
+
+#endif // MESHIO_H