fix issue with two votes on the same date

fix issue with header not showing correct vote date
split logic for Persistence into different files
create class that deals with voting time, existing votes, and what should be shown based on that

Shared/FeelsApp.swift

@@ -36,6 +36,8 @@ struct FeelsApp: App {
             
             if phase == .active {
                 UIApplication.shared.applicationIconBadgeNumber = 0
+                print("UserDefaultsStore input day", UserDefaultsStore.getOnboarding().inputDay)
+                print("UserDefaultsStore input date", UserDefaultsStore.getOnboarding().date)
             }
         }
     }