settings: implement KeyValueStore (#1659)

* settings: implement KeyValueStore and dependencies

* settings: update KeyValueStore for recent refactoring

* settings: address feedback

exosphere/program/source/smc/secmon_smc_info.hpp

@@ -34,7 +34,7 @@ namespace ams::secmon::smc {
         IsDevelopmentFunctionEnabled  = 11,
         KernelConfiguration           = 12,
         IsChargerHiZModeEnabled       = 13,
-        QuestState                    = 14,
+        RetailInteractiveDisplayState = 14,
         RegulatorType                 = 15,
         DeviceUniqueKeyGeneration     = 16,
         Package2Hash                  = 17,