Map for ConfigItems

-Created ConfigValue, an enum for all possible config parameters in ConfigLoader and MenuManager
-Added Get()/Set()  and ApplyConfigChante() that adds or subtracts value from the config type supplies depending on Pluss or Mines
-All classes using ConfigLoader now uses the above changes
Renamed ConfigValue -> ConfigValueType

-Renamed enum name and its header file
-Updated files with this change
Added ConfigValue