Made room state event collapsing configurable, expose it in the developer menu. Allow the UserSetting property wrappers to only store values in memory (+11 squashed commits)

Squashed commits:
[42e45fc] Even more tweaks following code review
[5dcd5be] Add swift-algoritms and switch bubbling detection to its `chunked` method
[4ac70ed] Move the groupBy implementation to Collection instead of Array
[6aeffc3] Tweaks following code review
[0ca5ac2] Bubbles working again, grouping computed closer to the UI level
[3a66030] Refactor how timeline items are built in the RoomTimelineController
[57d51e9] Remove grouping from timeline items
[8608950] Remove the RoomTimelineViewFactory, update the GroupRoomTimelineView
[9e52e61] Add array grouping extension, unit tests and switched the timeline controller to it
[7d213a1] First attempt
[90bb1d7] Remove now unused `RoomTimelineController` `updatedTimelineItem` calback

ElementX/Sources/Services/Timeline/TimelineItems/Items/Other/CollapsibleTimelineItem.swift

@@ -0,0 +1,43 @@
+//
+// Copyright 2023 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
+
+struct CollapsibleTimelineItem: RoomTimelineItemProtocol, Identifiable, Hashable {
+    let id: String
+    let items: [RoomTimelineItemProtocol]
+    
+    init(items: [RoomTimelineItemProtocol]) {
+        guard let firstItem = items.first else {
+            fatalError()
+        }
+        
+        self.items = items
+        id = firstItem.id
+    }
+    
+    // MARK: - Equatable
+    
+    static func == (lhs: CollapsibleTimelineItem, rhs: CollapsibleTimelineItem) -> Bool {
+        lhs.id == rhs.id
+    }
+    
+    // MARK: - Hashable
+    
+    func hash(into hasher: inout Hasher) {
+        hasher.combine(id)
+    }
+}

ElementX/Sources/Services/Timeline/TimelineItems/Items/Other/EncryptedRoomTimelineItem.swift

@@ -27,7 +27,6 @@ struct EncryptedRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable,
     let body: String
     let encryptionType: EncryptionType
     let timestamp: String
-    let groupState: TimelineItemGroupState
     let isOutgoing: Bool
     let isEditable: Bool
     

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

@@ -21,7 +21,6 @@ struct RedactedRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable, H
     let id: String
     let body: String
     let timestamp: String
-    let groupState: TimelineItemGroupState
     let isOutgoing: Bool
     let isEditable: Bool
     

ElementX/Sources/Services/Timeline/TimelineItems/Items/Other/StateRoomTimelineItem.swift

@@ -20,7 +20,6 @@ struct StateRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable, Hash
     let id: String
     let body: String
     let timestamp: String
-    let groupState: TimelineItemGroupState
     let isOutgoing: Bool
     let isEditable: Bool
     

ElementX/Sources/Services/Timeline/TimelineItems/Items/Other/StickerRoomTimelineItem.swift

@@ -20,7 +20,6 @@ struct StickerRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable, Ha
     let id: String
     let body: String
     let timestamp: String
-    let groupState: TimelineItemGroupState
     let isOutgoing: Bool
     let isEditable: Bool
     

ElementX/Sources/Services/Timeline/TimelineItems/Items/Other/UnsupportedRoomTimelineItem.swift

@@ -24,7 +24,6 @@ struct UnsupportedRoomTimelineItem: EventBasedTimelineItemProtocol, Identifiable
     let error: String
     
     let timestamp: String
-    let groupState: TimelineItemGroupState
     let isOutgoing: Bool
     let isEditable: Bool