Add input and output parameters to SAMPLE_LIB_Function to show more advanced generic stubs/hooks

Is your feature request related to a problem? Please describe.
SAMPLE_LIB_Function takes no parameters, so can't show example of registering them and using a hook.

Describe the solution you'd like
Add parameters (both pass by value and reference), update stubs to use suggested pattern:
UT_Stub_RegisterContextGenericArg(UT_KEY(SAMPLE_LIB_Function), param);

Follow on add a hook (likely from sample_app), register and show use of UT_Hook_GetArgValueByName.

Describe alternatives you've considered
There are plenty of implementations in core already, but hard to tell what the "gold standard" is. Need to trade complexity/simplicity though...

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC

Locate SAMPLE_LIB_Function and the sample_app hook examples, then compare the existing core implementations referenced in the issue to identify the suggested stub and hook patterns. Done means the sample demonstrates value and reference parameters, registers the generic stub arguments, and shows a hook retrieving an argument with UT_Hook_GetArgValueByName.