Dis-ambiguate method names between TN & GHED

[vtnate]

Is your feature request related to a problem? Please describe.
We write our own method called set_design, and we also use a method from GHED called set_design (which is called here in TN). Those confused me until I paid closer attention to the namespaces and figured out they were from different packages.

Describe the solution you'd like
Rename the ThermalNetwork method

Describe alternatives you've considered
The code works, we could just leave it alone.

Additional context
Add any other context or screenshots about the feature request here.