Redacted events in timeline (#199)

* Add redacted timeline item and view

* Use isOwn and isRedacted properties from sdk

* Build redacted items in factory

* Include redacted events in timeline

* Add changelog

* Fix unit tests

ElementX/Sources/Services/Timeline/TimelineItems/Items/RedactedRoomTimelineItem.swift

@@ -0,0 +1,33 @@
+//
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+import UIKit
+
+struct RedactedRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable, Equatable {
+    let id: String
+    let text: String
+    let timestamp: String
+    let shouldShowSenderDetails: Bool
+    let inGroupState: TimelineItemInGroupState
+    let isOutgoing: Bool
+    
+    let senderId: String
+    var senderDisplayName: String?
+    var senderAvatar: UIImage?
+    
+    var properties = RoomTimelineItemProperties()
+}