Use the new preview screen when tapping media on the room and pinned events screens. (#3736)

* Use the new TimelineMediaPreview modifier on the room and pinned timeline screens.

* Use the same presentation logic for all timeline media previews.

* Fix a bug with the detection of the timeline end.

* Send pagination requests from the media preview screen.

* Add SwiftLint to the Danger workflow (it is no longer installed on the runner).

* Put SwiftLint back on all of the GitHub runners too.

* Set the function_parameter_count lint rule to 10.

* Make sure to clean-up any previews when the coordinator is done.

* Handle the viewInRoomTimeline action more appropriately.

ElementX/Sources/Screens/Timeline/TimelineModels.swift

@@ -21,6 +21,7 @@ enum TimelineViewModelAction {
     case displayMediaUploadPreviewScreen(url: URL)
     case tappedOnSenderDetails(userID: String)
     case displayMessageForwarding(forwardingItem: MessageForwardingItem)
+    case displayMediaPreview(TimelineMediaPreviewViewModel)
     case displayLocation(body: String, geoURI: GeoURI, description: String?)
     case displayResolveSendFailure(failure: TimelineItemSendFailure.VerifiedUser, sendHandle: SendHandleProxy)
     case composer(action: TimelineComposerAction)
@@ -123,9 +124,6 @@ struct TimelineViewStateBindings {
     /// Key is itemID, value is the collapsed state.
     var reactionsCollapsed: [TimelineItemIdentifier: Bool]
     
-    /// A media item that will be previewed with QuickLook.
-    var mediaPreviewItem: MediaPreviewItem?
-    
     var alertInfo: AlertInfo<RoomScreenAlertInfoType>?
     
     var debugInfo: TimelineItemDebugInfo?