Enhance Meshing Module for Gmsh to DolfinX Mesh Conversion

[ivanmaione]

Description of issue / requirement to address

The Meshing module currently lacks the capability to convert a Gmsh mesh into a DolfinX mesh on the fly. This leads to:

• Unnecessary computational time spent on saving and loading the corresponding .msh mesh file for each finite element model.
• The need to implement the necessary part in Gmsh, bypassing the use of the meshing module.

Proposed solution

Revise the meshing workflow to prevent Gmsh from finalizing at the end of the meshing process. Implement the required methods for exporting a Gmsh.model without intermediate file storage.

Alternative solutions

Additional context