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/Services/Timeline/TimelineProxyProtocol.swift

@@ -14,10 +14,20 @@ enum TimelineKind: Equatable {
     case detached
     case pinned
     
-    enum MediaPresentation { case roomScreen, mediaFilesScreen }
+    enum MediaPresentation { case roomScreenLive, roomScreenDetached, pinnedEventsScreen, mediaFilesScreen }
     case media(MediaPresentation)
 }
 
+enum TimelineFocus {
+    case live
+    case eventID(String)
+    case pinned
+}
+
+enum TimelineAllowedMessageType {
+    case audio, file, image, video
+}
+
 enum TimelineProxyError: Error {
     case sdkError(Error)