Old Prisms Eshelby App Updates

[john-mcki]

Description

Old Eshelby Application Update. Note, history is slightly messed up.

Checklist

Miscellaneous items that may need to be done when making a PR:

• [ ] Documentation related to this PR is up to date (Doxygen format)
• [x] Unit test(s)
• [x] Code is properly formatted
• [ ] Application update script is up to date
• [x] PR labels are applied
• [x] Issues are linked

[fractalsbyx]

Could you summarize the changes in the PR description

[john-mcki]

Some specifics on the changes:

• in equations.cc: added distance as a calculated double, added a variable to track inclusion radius (may be redundant, as its a variable in parameters.prm), adjusted sfts to use tanh instead of the exponential identity of tanh
• in IC's and BC's added a for loop to calculate the boundary conditions (for loop calculations based on analytical solution)
• in customPDE added lines to read new variables I added to parameters.prm