Rework the presentation of the media browser quick look view to use SwiftUI. (#3619)

* Embed the media preview quick look inside a full screen cover

With a zoom transition on iOS 18.

* Use a the representable coordinator properly.

* Fix a bug with the toolbar appearance.

* Format

* Try prevent the zoom transition being upside down.

* Fix the snapshot test configuration.

ElementX/Sources/Screens/MediaEventsTimelineScreen/MediaEventsTimelineScreenModels.swift

@@ -5,10 +5,10 @@
 // Please see LICENSE in the repository root for full details.
 //
 
-import Foundation
+import SwiftUI
 
 enum MediaEventsTimelineScreenViewModelAction {
-    case viewInRoomTimeline(TimelineItemIdentifier)
+    case viewItem(TimelineMediaPreviewContext)
 }
 
 enum MediaEventsTimelineScreenMode {
@@ -29,16 +29,17 @@ struct MediaEventsTimelineScreenViewState: BindableState {
     var activeTimelineContextProvider: (() -> TimelineViewModel.Context)!
     
     var bindings: MediaEventsTimelineScreenViewStateBindings
+    
+    var currentPreviewItemID: TimelineItemIdentifier?
 }
 
 struct MediaEventsTimelineScreenViewStateBindings {
     var screenMode: MediaEventsTimelineScreenMode
-    var mediaPreviewViewModel: TimelineMediaPreviewViewModel?
 }
 
 enum MediaEventsTimelineScreenViewAction {
     case changedScreenMode
     case oldestItemDidAppear
     case oldestItemDidDisappear
-    case tappedItem(RoomTimelineItemViewState)
+    case tappedItem(item: RoomTimelineItemViewState, namespace: Namespace.ID)
 }