Video playback (#308)

* Create media player screen

* Introduce `FileCache` to cache message attachments

* Add file loading functionality into the media provider

* Process tap action on timeline items

* Pass item taps to view model

* Navigate to media player on view model callback

* Commit project file

* Add changelog

* Rename media to video

* Add a loader when large videos being processed

* Add back button explicitly on video screen, fixes for light scheme

* Handle right swipe to dismiss video

ElementX/Sources/UITests/UITestsAppCoordinator.swift

@@ -115,13 +115,15 @@ class MockScreen: Identifiable {
         case .splash:
             return SplashScreenCoordinator()
         case .roomPlainNoAvatar:
-            let parameters = RoomScreenCoordinatorParameters(timelineController: MockRoomTimelineController(),
+            let parameters = RoomScreenCoordinatorParameters(navigationRouter: navigationRouter,
+                                                             timelineController: MockRoomTimelineController(),
                                                              mediaProvider: MockMediaProvider(),
                                                              roomName: "Some room name",
                                                              roomAvatarUrl: nil)
             return RoomScreenCoordinator(parameters: parameters)
         case .roomEncryptedWithAvatar:
-            let parameters = RoomScreenCoordinatorParameters(timelineController: MockRoomTimelineController(),
+            let parameters = RoomScreenCoordinatorParameters(navigationRouter: navigationRouter,
+                                                             timelineController: MockRoomTimelineController(),
                                                              mediaProvider: MockMediaProvider(),
                                                              roomName: "Some room name",
                                                              roomAvatarUrl: "mock_url")