Reverting to TableView but with SwiftUI compatibility (#1407)

* revert but also allows us to keep the existing SwiftUI implementation if we need it

* code improvement

* pr review

* FF is volatile

* message that communicates that is volatile

ElementX/Sources/Screens/RoomScreen/RoomScreenModels.swift

@@ -61,6 +61,7 @@ enum RoomScreenViewAction {
     case cancelEdit
     /// Mark the entire room as read - this is heavy handed as a starting point for now.
     case markRoomAsRead
+    case paginateBackwards
     
     case timelineItemMenu(itemID: TimelineItemIdentifier)
     case timelineItemMenuAction(itemID: TimelineItemIdentifier, action: TimelineItemMenuAction)
@@ -92,6 +93,7 @@ struct RoomScreenViewState: BindableState {
     var isEncryptedOneToOneRoom = false
     var timelineViewState = TimelineViewState() // check the doc before changing this
     var composerMode: RoomScreenComposerMode = .default
+    var swiftUITimelineEnabled = false
 
     var bindings: RoomScreenViewStateBindings
     
@@ -177,6 +179,10 @@ struct RoomMemberState {
 struct TimelineViewState {
     var canBackPaginate = true
     var isBackPaginating = false
+
+    // These can be removed when we have full swiftUI and moved as @State values in the view
+    var scrollToBottomPublisher = PassthroughSubject<Void, Never>()
+
     var itemsDictionary = OrderedDictionary<String, RoomTimelineItemViewState>()
 
     var timelineIDs: [String] {
@@ -186,6 +192,4 @@ struct TimelineViewState {
     var itemViewStates: [RoomTimelineItemViewState] {
         itemsDictionary.values.elements
     }
-
-    var paginateAction: (() -> Void)?
 }