Improve Thermal API method Docstrings

[JackB-Ansys]

Description of the modifications

Expand docstrings for thermal API methods such as set_resistance_value in rpc_methods_thermal.py.

The docstrings should:

• Specify the accepted data types (int, float, string etc.) for arguments.
• Provide a description of the arguments.
• In some cases, provide a better explanation of what the method does. (For the example below, "Set or create a thermal resistance in the Motor-CAD thermal circuit.")

For example:

def set_resistance_value(self, name, node1, node2, value, description):
    """Set or create a resistance."""

This method docstring should specify that the node1 and node2 arguments must be an integer. Otherwise, the resulting error message can be confusing to the user. For example, if an integer number is provided as a float type, we get the following error:

MotorCADError: SetResistanceValue: One or more parameter types were invalid. HINT [: Cannot map all parameters to remote method. Invalid
Request. The JSON sent is not a valid Request object. [HINT] node1: Integer]

This error is not concise or clear in this case.

Useful links and references

No response