Media gallery - part 1(#3588)

* Introduce a `MediaEventsTimelineFlowCoordinator`
* Update SDK API and architecture
* Add a feature flag, add translations
* Move the media events timeline presentation under the room flow coordinator state machine
* Rename `TimelineViewState.timelineViewState` of type `TimelineState` to `timelineState`
* Enabled SwiftLint's `trailing_closure` rule and fix the warnings.

ElementX/Sources/Screens/RoomDetailsScreen/RoomDetailsScreenCoordinator.swift

@@ -29,6 +29,7 @@ enum RoomDetailsScreenCoordinatorAction {
     case presentRolesAndPermissionsScreen
     case presentCall
     case presentPinnedEventsTimeline
+    case presentMediaEventsTimeline
     case presentKnockingRequestsListScreen
 }
 
@@ -80,6 +81,8 @@ final class RoomDetailsScreenCoordinator: CoordinatorProtocol {
                     actionsSubject.send(.presentCall)
                 case .displayPinnedEventsTimeline:
                     actionsSubject.send(.presentPinnedEventsTimeline)
+                case .displayMediaEventsTimeline:
+                    actionsSubject.send(.presentMediaEventsTimeline)
                 case .displayKnockingRequests:
                     actionsSubject.send(.presentKnockingRequestsListScreen)
                 }