feat(meshIO): added linear rescale capability to meshIO

loaded meshes can be linearly rescaled (so for example a unit sphere can be rescaled to a sphere of any radius)

src/meshIO/public/meshIO.h

@@ -2,7 +2,7 @@
 //
 //   Copyright (C) 2025 -- The 4D-STAR Collaboration
 //   File Author: Emily Boudreaux
-//   Last Modified: February 16, 2025
+//   Last Modified: March 18, 2025
 //
 //   4DSSE is free software; you can use it and/or modify
 //   it under the terms and restrictions the GNU General Library Public
@@ -39,13 +39,19 @@ 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);
+    MeshIO(const std::string &mesh_file, double scale_factor = 1.0);
 
     /**
      * @brief Destructor for the MeshIO class.
      */
     ~MeshIO();
 
+    /**
+     * @brief Rescale the mesh by a linear factor.
+     * @param scale_factor The factor by which to scale the mesh.
+     */
+    void LinearRescale(double scale_factor);
+
     /**
      * @brief Get the mesh object.
      * @return Reference to the mesh object.