User-Reported Defect: Simulation should check the state of initialization and give a clear message

[MeWu-IDM]

Describe the defect
This issue is when @Nyerere has invalid type in CadreRoles sheet, there was a warning:

pacehrh::InitializeCadreRoles()
Loading cadre roles sheet CadreRoles
Warning message:
Columns with incorrect types in table: OverheadHoursPerWeek

However, this only appears as a warning so user may not be aware of the consequence. later on he is getting an unhandled exception

To reproduce
Steps to reproduce the behavior:
specify OverheadHoursPerWeek = NA or something not an integer

Expected behavior
An error handling mechanism for initialization problems before running into the actual calculation (at very least, error should be self-explianary to users)
https://github.com/InstituteforDiseaseModeling/PACE-HRH/blob/main/pacehrh/R/pace_save_cadre_data.R#L21