SwiftUI NavigationController and UserNotificationControllers (#309)

* Fixes #286 - Adopted the new SwiftUI NavigationStack based NavigationController throughout the application
* Fixes #315 - Implemented new user notification components on top of SwiftUI and the new navigation flows
* Add home screen fade animation between skeletons and real rooms
* Bump the danger-swift version used on the CI and swiftlint with it
* Renamed Splash to Onboarding, Empty to Splash

ElementX/Sources/Screens/HomeScreen/View/HomeScreen.swift

@@ -28,23 +28,30 @@ struct HomeScreen: View {
                 sessionVerificationBanner
             }
             
-            LazyVStack {
-                ForEach(context.viewState.visibleRooms) { room in
-                    if room.isPlaceholder {
+            if context.viewState.roomListMode == .skeletons {
+                LazyVStack {
+                    ForEach(context.viewState.visibleRooms) { room in
                         HomeScreenRoomCell(room: room, context: context)
                             .redacted(reason: .placeholder)
                             .disabled(true)
-                    } else {
+                    }
+                }
+                .padding(.horizontal)
+            } else {
+                LazyVStack {
+                    ForEach(context.viewState.visibleRooms) { room in
                         HomeScreenRoomCell(room: room, context: context)
                     }
                 }
+                .padding(.horizontal)
+                .searchable(text: $context.searchQuery)
             }
-            .padding(.horizontal)
-            .searchable(text: $context.searchQuery)
         }
         .disabled(context.viewState.roomListMode == .skeletons)
         .animation(.elementDefault, value: context.viewState.showSessionVerificationBanner)
+        .animation(.elementDefault, value: context.viewState.roomListMode)
         .ignoresSafeArea(.all, edges: .bottom)
+        .alert(item: $context.alertInfo) { $0.alert }
         .navigationTitle(ElementL10n.allChats)
         .toolbar {
             ToolbarItem(placement: .navigationBarLeading) {