Fix A11y tests (#5104)

* replace NavigationStack with ElementNavigationStack to allow the content to be rendered without a NavigationStack in a11y tests

* fix a11y tests

* update xcodeproject

* swiftformat fix

* use iOS 26.1 for CI

* use a wrapper to solve the issue for a11y tests

* ElementNavigationStack only uses the trick in DEBUG mode, and added a swiftlint rule to prevent the usage of NavigationStack

ElementX/Sources/Screens/RoomDirectorySearchScreen/View/RoomDirectorySearchScreen.swift

@@ -13,7 +13,7 @@ struct RoomDirectorySearchScreen: View {
     @ObservedObject var context: RoomDirectorySearchScreenViewModel.Context
     
     var body: some View {
-        NavigationStack {
+        ElementNavigationStack {
             List {
                 Section {
                     ForEach(context.viewState.rooms) { room in