Test-case for testing the stresslet calculation

Running the simulation:

- To run the simulation:
  ./Allrun.sh

- To clean-up the directory after the simulation is run: 
  ./Allclean.sh 

- Simulation parameters are summarized in ./settings

- To enable automatic post-processing (graph plotting), set 
  "runVerification=true" in ./Allrun.sh (works with Python 3.11.5)

- Assembly generation parameters are set in ./system/searchableSurfacesDict

- "sphereList" (list of searchable surfaces) and "eMeshesList" (list of eMeshes)
  is included in ./system/snappyHexMeshDict

- "includeForcesFiles" (list of force function objects for post-processing) is
  included in ./system/controlDict

