Unit test for remesh.cpp

[Eleven7825]

Problem

During work on pull request #450, we(@mrp089 and I) noticed that remesh.cpp currently has 0% test coverage. Since we have made several changes to this file, we would like to ensure that the remeshing functionality remains functional. If any tests exist for remesh.cpp (e.g., locally or in development branches), it would be helpful to have them added to the test suite.

Solution

Add existing or create new tests for remesh.cpp to improve code coverage and verify correctness after changes in PR #450.
If no tests are available, we will proceed with merging the PR, but adding tests is strongly encouraged for future stability.

Additional context

No response

Code of Conduct

• I agree to follow this project's Code of Conduct and Contributing Guidelines

[ktbolt]

@Eleven7825 I created a remeshing test for svFSI-Tests 03-pipe_3D when converting the Fortran code.

The Fortran svFSI code had some bugs that I think I fixed but I'm not sure if this code is robust. Note that this code is used primarily for ALE simulations.

[mrp089]

From the coverage report, it looks like remesh.cpp is not covered. ALE FSI moves the fluid mesh nodes (solving a linear elasticity problem), whereas remeshing can actually generate new nodes and elements with tetgen.