Add effects to the congratulations screen when personalisation is disabled.

Improve the API of the EffectsView to make it more swifty.

RiotSwiftUI/Modules/Onboarding/Congratulations/View/OnboardingCongratulationsScreen.swift

@@ -54,6 +54,7 @@ struct OnboardingCongratulationsScreen: View {
                    maxHeight: OnboardingConstants.maxContentHeight)
             .frame(maxWidth: .infinity, maxHeight: .infinity)
         }
+        .overlay(effects.ignoresSafeArea())
         .background(theme.colors.accent.ignoresSafeArea())
         .accentColor(.white)
         .navigationBarHidden(true)
@@ -120,6 +121,13 @@ struct OnboardingCongratulationsScreen: View {
         .buttonStyle(PrimaryActionButtonStyle(customColor: .white))
         .accessibilityIdentifier("homeButton")
     }
+    
+    @ViewBuilder
+    var effects: some View {
+        if viewModel.viewState.personalizationDisabled {
+            EffectsView(effectsType: .confetti)
+        }
+    }
 }
 
 // MARK: - Previews