Add new menus

Model/MenuModel.swift

@@ -0,0 +1,18 @@
+import Combine
+import Foundation
+
+final class MenuModel: ObservableObject {
+    @Published var accounts: AccountsModel? { didSet { registerChildModel(accounts) } }
+    @Published var navigation: NavigationModel? { didSet { registerChildModel(navigation) } }
+    @Published var player: PlayerModel? { didSet { registerChildModel(player) } }
+
+    private var cancellables = [AnyCancellable]()
+
+    func registerChildModel<T: ObservableObject>(_ model: T?) {
+        guard !model.isNil else {
+            return
+        }
+
+        cancellables.append(model!.objectWillChange.sink { [weak self] _ in self?.objectWillChange.send() })
+    }
+}