Easyfea

- Updated phase field solver.

- Updated docstrings.
- Updated Display functions.
- Updated PyVista_Interface functions.
- Added _Elas.Get_sqrt_C_S() function.
- Updated He split for heterogeneous material properties.
- Added Save_pickle() and Load_pickle() functions.
- Updated Gmsh_Interface for cracks.
- Updated Folder functions.

- Ensures compatibility with python 3.9 and 3.10.

- Updated docstrings.
- Updated simulations/_phasefield.py solver.
- Updated Bc Config.
- Updated tests.
- Updated _Additional_Points().
- Updated Mesh_Beams().

- Updated docstrings.

- Added the resetAll option in Set_Iter() to simplify the update process after iteration activation.
- Enhanced clarity in phase field functions, including both simulation and material aspects.
- Improved display options for geometric objects.
- Improved display functions.
- Provided clearer functionality in mesh and group element.
- Updated the interface with Gmsh.
- Improved phasefield examples.
- Enhanced the Digital Image Correlation (DIC) analysis module.