📓 Documentation request | Potential contact missing from TM; UM missing 2 parameters

[stevenlabelle]

Document & Version:
FEBio TM: https://help.febio.org/docs/FEBioTheory-4-10/TM410-Chapter-7.html
FEBio UM: https://help.febio.org/docs/FEBioUser-4-10/UM410-Subsection-3.14.10.html

Section:
TM: 7 - Contact and Coupling
UM: 3.14.10 - Contact Potential

Request/Report:
TM: No section for contact potential. The equations for the potential should be added to give context for the parameters in the UM.
UM: Missing documentation for check_intersections and integration_rule parameters.